Detailed step by step solution for e^{-x}/times e^{-x} Analytics Cookies allow us to understand how visitors use our Services. In order to simply ‘multiply’ or ‘times’ a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. sin(2x) = 2 sin x cos x cos(2x) = cos ^2 (x) - sin ^2 (x) = 2 cos ^2 (x) - 1 = 1 - 2 sin ^2 (x). Algebra Solve for x Calculator Step 1: Enter the Equation you want to solve into the editor. We can write x = ab + (-a) [ (b) + (-b) ] (factor out -a) = ab + (-a) (0) = ab + 0 = ab. y=x^2+1 (Graph Example), 4x+2=2 (x+6) (Solve Example) Algebra Calculator is a calculator that gives step-by-step help on algebra problems. x times x equals x^2, or x squared. And by some kind of definition, this equals the squared length of the vector in a euclidian sense. Multiplication is, therefore, a quicker way of adding the same number many times, for example, 3 × 4 = 12. 2, times, left parenthesis, minus, 3, right parenthesis, equals, minus, 6. 4 is less than 5. zt3hoaYM6_C3ik- referrerpolicy=origin target=_blank>See full list on mathpapa. Multiplying and dividing negatives are the same because there is no difference between those sides of zero except the side of zero. x times x= x2 It is X squared. A negative times a positive will always equal a negative number. To check whether a more complex expression is equivalent to a simpler expression: Distribute any coefficients: a ( b. Equivalent expressions are expressions that work the same even though they look different. Free Online Scientific Notation Calculator. To solve x plus x, imagine the variable x as a familiar object, for example an apple. Enter the 2 factors to multiply and press the Calculate button: First factor. In the same way, we can show the distributive law for exponentiation: (xy)a = (xy) × (xy) × ⋯ × (xy) ⏟ a times = x × x × ⋯ × x ⏟ a times × y × y × ⋯ × y ⏟ a times = xaya. -10 x -5 = +50A negative times a negative will always equal a positive number. He takes 2 paces at a time, and does this three times, so he moves 2 steps x 3 = 6 steps forward: Now, Baby Steven can also step backwards (he is a clever little guy). Here’s the overall rule to remember when multiplying positive and negative numbers: Two like signs make a positive sign: Two unlike signs make a negative sign:. What is 2x times x in Algebra? Multiplying Variables. The equation calculator allows you to take a simple or complex equation and solve by best method possible. ? Q&A By tamdoan · November 30, 2022 ·. 1 ⋅ x = x OR: 0 + x = x 1 + x = 1 XOR: 0 ⊕ x = x 1 ⊕ x = x One variable NOT: NOT x = x AND: x ⋅ x = x x ⋅ x = 0 OR: x + x = x x + x = 1 XOR: x ⊕ x = 0 x ⊕ x = 1 XOR XOR can be defined in terms of AND, OR, NOT: x. Step 2: Click the blue arrow to submit and see the result!. x squared times x squared means that x squared multiplied by itself. Well here we have Baby Steven taking his first steps. They are known as exponential functions such as e x, 10 x, a n d a x. x is greater than or equal to 2x. Multiplying and dividing negatives are the same because there is no difference between those sides of zero except the side of zero. 22 means to multiply 2 by itself two times 41 means to multiply 4 by itself once x3 means to multiply x by itself three times In your case, x2 means that x is multiplied by itself 2 times, or x ⋅ x . Simplify 1/x+1/y. If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value for. The arccosine of x is defined as the inverse cosine function of x when -1≤x≤1. Solve for x: 3e^ {3x} /cdot e^ {-2x+5}=2 3e3x⋅e−2x+5 =2. What is x times x equal to in algebra? To solve x multiplied by x, try to observe the pattern created by letting x be any number. com>What Times What Equals. But if we were to do this, we would get x is equal to x, and then we could subtract x from both sides. 1 x ⋅ y y + 1 y ⋅ x x 1 x ⋅ y y + 1 y ⋅ x x. Multiplication calculator (×). Disclaimer: This calculator is not perfect. com/_ylt=AwrNZqxil1pkXLsKJmhXNyoA;_ylu=Y29sbwNiZjEEcG9zAzQEdnRpZAMEc2VjA3Ny/RV=2/RE=1683687394/RO=10/RU=https%3a%2f%2fwww. Negative numbers Calculator & Problem Solver. Watch Super Bowl LVII live on FOX Sunday Feb 12, 1PM. transpose something special?>Is a matrix multiplied with its transpose something special?. Algebra Solve for x Calculator Step 1: Enter the Equation you want to solve into the editor. X Times X Squared Calculator. The answer is -2 x -4 = 8. The multiplicative inverse (the opposite in your question) of a non-zero number x is its reciprocal, 1 x. X Times X Squared Calculator for algebra manipulations. If yes, then you can force the equation equal to 0. Khan Academy>Writing expressions. can be written as the expression. Calculate the pH of a solution of 0. You would never say a tenth times more or half times more or even one time (s) more. Thus 2xy means 2 times x times y or said algebraically 2xy = 2 /times x /times y. Then, x squared times x squared = x 2 · x 2 = x (2 + 2) = x 4. In algebra when two symbols that stand for a number are placed beside each other the operation between them is taken to be multiplication. Watch Super Bowl LVII live on. The Correct Answer Explained By A Mathematician MindYourDecisions MindYourDecisions Simultaneous. – user61527 Feb 2, 2014 at 1:42 Squareroot is the opposite of squaring. Solve advanced problems in Physics, Mathematics and Engineering. When you multiply a constant by itself, it is just something^2. 2X would be X + X. If all of the terms in the two expressions are identical, then the two expressions are equivalent. Number of solutions to equations. Example: Solve for 5 = x^2 + 4x + 8. Lets try substituting different values. Tap for more steps y xy + x xy y x y + x x y. So theres two situations where this could happen,. When the cosine of y is equal to x: cos y = x Then the arccosine of x is equal to the inverse cosine function of x, which is equal to y: arccos x = cos -1 x = y Example arccos 1 = cos -1 1 = 0 rad = 0° See: Arccos function Cosine table See also Cos calculator. x is greater than or equal to 2x. In math terms: x*x = x^2. What does cosx sinx equal?. If you evaluate x T ⋅ x you multiply the one single row of x T with the single column of x to give you just a single number. The e calculator helps you to calculate the value of e to the power of x. cot ^2 (x) + 1 = csc ^2 (x). Detailed step by step solution for e^{-x}/times e^{-x} Analytics Cookies allow us to understand how visitors use our Services. This function f (x) =7x−5 means that each time we plug in a value of x we would multiply it by 7 then subtract 5. x squared is a notation that is used to represent the expression x ×x x × x. And by some kind of definition, this equals the squared length of the vector in a euclidian sense. If you evaluate x T ⋅ x you multiply the one single row of x T with the single column of x to give you just a single number. Eight divided by four is 2, therefore x is equal to 2. 1 ⋅ x = x OR: 0 + x = x 1 + x = 1 XOR: 0 ⊕ x = x 1 ⊕ x = x One variable NOT: NOT x = x AND: x ⋅ x = x x ⋅ x = 0 OR: x + x = x x + x = 1 XOR: x ⊕ x = 0 x ⊕ x = 1 XOR XOR can be defined in terms of AND, OR, NOT: x ⊕ y = ( x ⋅ y) + ( x ⋅ y) x ⊕ y = ( x + y) ⋅ ( x + y) x ⊕ y = ( x + y) ⋅ (x ⋅ y) Commutativity AND: x ⋅ y = y ⋅ x OR: x + y = y + x. We know the amount of water in the tank changes by −1,000 every day, and we need to subtract that 3 times (to go back 3 days ), so the change is: −3 × −1,000 = +3,000 The full calculation is: 30,000 + (−3 × −1,000) = 30,000 + 3,000 = 33,000 So 3 days ago there were 33,000 liters of water in the tank. Solve advanced problems in Physics, Mathematics and Engineering. Eight divided by four is 2, therefore x is equal to 2. So for example, 2x times x, the answer would be 2x^2. This rule also works for quotients (x y)a = xa ya, but it does NOT work for sums. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Get Chegg Math Solver. They do this by collecting information about the number of visitors to the Services, what pages visitors view on our Services and how long visitors are viewing pages on the Services. Combine any like terms on each side of the equation. The arccosine of x is defined as the inverse cosine function of x when -1≤x≤1. His Dad puts him back at the start and then Steven steps backwards 2 steps, and does this three times:. What Is X Times 2x? – Thelma Thinks. How do you write X times 2? To write “X times 2” in a sentence, you would write “X * 2”. You already understand that negative 7 times some number is always going to be negative 7 times that number. If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value for the variable. Also, x squared = x 2. To write 1 y 1 y as a fraction with a common denominator, multiply by x x x x. Lets try substituting different values for x f (3)=73−5=21−5=16 → If substitute x by 3, this is what we get. The opposite of multplying, if anything, is dividing, not taking square roots. Basic rules for exponentiation. Also, x = [ a + (-a) ]b + (-a) (-b) (factor out b) = 0 * b + (-a) (-b) = 0 + (-a) (-b) = (-a) (-b). Well, maybe not force but you can rearrange the equation such that you will have the quadratic in the form Ax^2 + Bx^2 + C = 0. To solve x plus x, imagine the variable x as a familiar object, for example an apple. x^2 because you have x number of xs. For example, (3 + 5)2 = 82 = 64, but this is NOT equal to 32 + 52 = 9 + 25 = 34. Then the question then is what is a root, well the square root of a number is a function that finds a seperate value y whose squared is to x. In order to show that T is a function, you need to prove that for each pair of subsets A and B of X there is one and only one subset U of X/times X such that T(A,B)=U, that is,. The answer is -2 x -4 = 8. In order to simply multiply or times a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. As follows. X can be any number or a power value of your choice and e is the exponent. Thus, x squared times x squared is x 2 × x 2 = x 4. -10 x -5 = +50A negative times a negative will always equal a positive number. Absolute Value in Algebra. X can be any number or a power value of your choice and e is the exponent. To check an answer to a system of equations containing x and y, enter the two equations separated by a semicolon, followed by the @ sign and an ordered pair containing your x-value and y-value. Actually, x = 0 is also a solution. In order to simply ‘multiply’ or ‘times’ a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Is a matrix multiplied with its transpose something special?. Step by steps for fractions, factoring, and prime factorization. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Variables in Algebra: When youre doing a math problem and are working with a number you dont yet know, you use a variable in place of the number. The following notation is used for Boolean algebra on this page, which is the electrical engineering notation: False: 0. More formally we have: Which says the absolute value of x equals: x when x is greater than zero. To check an answer to a system of equations containing x and y, enter the two equations separated by a semicolon, followed by the @ sign and an ordered pair containing your x-value and y-value. Consider the number x defined by x = ab + (-a) (b) + (-a) (-b). 2X would be X + X x^2 because you have x number of xs Whereas 2x is 2 “x”s which is twice x x squared PLEASE HELP!!! The Kb of pyridine, C5H5N, is 1. Combine the numerators over the common denominator. If it were true that x x = x for all x, that would imply x = 1 for all x. And then they ask us to find f times g of x So the first thing to realize is that this notation f times g of x is just. When multiplying variables in algebra which are the same, you can solve it by adding the exponents. Note that x by itself is actually to. This function f (x) =7x−5 means that each time we plug in a value of x we would multiply it by 7 then subtract 5. What does x times y equal?. Sometimes in math we describe an expression with a phrase. Tablet Mode If you are using a tablet such as the iPad, enter Tablet Mode to display a touch keypad. The Correct Answer Explained By A Mathematician MindYourDecisions MindYourDecisions. To solve x plus x, imagine the variable x as a familiar object, for example an apple. x squared is a notation that is used to represent the expression x ×x x × x. So: Just write x and x^T$ as matrices and use the usual way of multiplying them. [remember x = x^1]: x*x = x^2 x^2*x = x^3 2x*x = 2*x*x = 2* (x*x) = 2* (x^2) = 2x^2 Guest Mar 3, 2015 16 +18 Answers #1 +17. 5 = x^2 + 4x + 8 0 = x^2 + 4x + 3 { subtract 5 from both sides } 0 = (x + 3) (x + 1) { factorise }. His Dad puts him back at the start and then Steven steps backwards 2 steps, and does this three times:. In the same way, we can show the distributive law for exponentiation: (xy)a = (xy) × (xy) × ⋯ × (xy) ⏟ a times = x × x × ⋯ × x ⏟ a times × y × y × ⋯ × y ⏟ a times = xaya. f (x)=7x−5 → This our function with just x. What the X number does tell you is a rough measure of how much compromise was made in the lens design. Thus, x squared times x squared can be written as x 2 · x 2. x times x= x2. – fkraiem Feb 2, 2014 at 1:41 3 x is the number satisfying x x = x; its not the opposite of multiplying by x. Calculate it! Examples: 1+2 , 1/3+1/4 , 2^3 * 2^2 (x+1) (x+2) (Simplify Example), 2x^2+2y @ x=5, y=3 (Evaluate Example) y=x^2+1 (Graph Example), 4x+2=2 (x+6) (Solve Example) Algebra Calculator is a calculator that gives step-by-step help on algebra problems. Multiplying functions (video). In order to show that T is a function, you need to prove that for each pair of subsets A and B of X there is one and only one subset U of X/times X such that T(A,B)=U, that is, ((A,B),U) /in T What is the right norm for the Banach space tensor product in this situation?. x times x equals x^2, or x squared. The inverse can of B can be determined by employing our special matrix inversion routine. And then they ask us to find f times g of x So the first thing to realize is that this notation f times g of x is just referring to a function that is a product of f of x and g of x. What is x times x in algebra? (x^2 or 2x). More formally we have: Which says the absolute value of x equals: x when x is greater than zero; 0 when x equals 0; −x when x is less than zero (this flips the number back to positive); So when a number is positive or zero we leave it alone, when it is negative we change it to positive using −x. Algebra Solve for x Calculator Step 1: Enter the Equation you want to solve into the editor. So root is the inverse operation of exponents. What is x multiplied by 2x?. -10 x -5 = +50A negative times a negative will always equal a positive number. Negative x Negative = Positive? Abstract Proofs. Everything is a tradeoff, and zoomability is not free, both in $ to allow for the zooming and in optical quality. What is x multiplied by 2x? Question: What is x multiplied by 2x? Commutative and Associative Properties of Multiplication: There are many different properties within the study of mathematics,. In general, no. In order to show that T is a function, you need to prove that for each pair of subsets A and B of X there is one and only one subset U of X/times X such that T(A,B)=U, that is, ((A,B),U) /in T What is the right norm for the Banach space tensor product in this situation?. Solved X Times Examples: 12x X 2x = ? 12x X 2x = 24x 2. What is x plus x in algebra? Conceptual Understanding. When you multiply a constant by itself, it is just something^2. Since x is equal to x 1 / 2, your equation is the same as x 3 / 2 = x, only x = 0, 1 work as solutions. Variables are usually indicated with letters. Yes, but also see below Explanation: ln2x is simply another way of writing (lnx)2 and so they are equivalent. Which says the absolute value of x equals: x when x is greater than zero 0 when x equals 0 −x when x is less than zero (this flips the number back to positive) So when a number is positive or zero we leave it alone, when it is negative we change it to positive using −x. Another way you could write it is You could write 2 and then you could write the x in parentheses right next to it. What Does X Times X EqualTo write 1 y 1 y as a fraction with a common denominator, multiply by x x x x. x T A A T x = ( A T x) T ( A T x) > 0 Then we have: A matrix is positive definite if and only if its the Gram matrix of a linear independent set of vectors. Whereas 2x is 2 “x”s which is twice x. cos(x)sin(x) = sin(2x) 2 Explanation: So we have cos(x)sin(x) If we multiply it by two we have 2cos(x)sin(x) Which we can say its a sum cos(x)sin(x) + sin(x)cos(x) Which is the double angle formula of the sine cos(x)sin(x) + sin(x)cos(x) = sin(2x). We know the amount of water in the tank changes by −1,000 every day, and we need to subtract that 3 times (to go back 3 days ), so the change is: −3 × −1,000 = +3,000 The full calculation is: 30,000 + (−3 × −1,000) = 30,000 + 3,000 = 33,000 So 3 days ago there were 33,000 liters of water in the tank. Multiplication is, therefore, a quicker way of adding the same number many times, for example, 3 × 4 = 12. But this can really be interpreted as 2 times x So for example, if someone says 2 dot x, when x is equal to 3, well this would be the same thing as two times three, when x is equal to three. The key to this lesson is to realize that an exponent tells us to multiply a number. What is x squared times x squared?. In this video we look at the reason why x times x is x raised to the power 2, also known as x squared. 4x X 2x = ? 4x X 2x =8 2. This rule also works for quotients (x y)a = xa ya, but it does NOT work for sums. 0 when x equals 0. x*x (x times x) equals what?. He takes 2 paces at a time, and does this three times, so he moves 2 steps x 3 = 6 steps forward: Now, Baby Steven can also step backwards (he is a clever little guy). Multiplying negative numbers review (article). Write each expression with a common denominator of xy x y, by multiplying each by an appropriate factor of 1 1. Detailed step by step solution for e^{-x}/times e^{-x} Analytics Cookies allow us to understand how visitors use our Services. Keep on reading to know what does e equal to and. In order to simply ‘multiply’ or ‘times’ a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. Combine any like terms on each side of the equation: x x x x-terms with x x x x-terms and constants with constants Arrange the terms in the same order, usually x x x x -term before constants. x T A A T x = ( A T x) T ( A T x) > 0 Then we have: A matrix is positive definite if and only if its the Gram matrix of a linear independent set of vectors. Multiplying Negatives Makes A Positive. X Times 2x? – Thelma Thinks>What Is X Times 2x? – Thelma Thinks. X minus five times five X plus two, when does that equal zero? And like we saw before, well, this is just like what we saw before, and I encourage you to pause the video, and try to work it out on your own. Multiplying Positive and Negative Numbers: 3 Simple Rules>Multiplying Positive and Negative Numbers: 3 Simple Rules. This function f (x) =7x−5 means that each time we plug in a value of x we would multiply it by 7 then subtract 5. When multiplying exponents, such as x times x, would the. And then you would get zero equals zero, which is true for any x that you pick. For example, in the problem 10x - 5 equals 15, you need to figure out what the x stands for in order to make the equation true. In order to simply ‘multiply’ or ‘times’ a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. x times x, would the >When multiplying exponents, such as x times x, would the. com%2fcalc%2ftutorial%2f/RK=2/RS=LptPFEmsFGlj. Last but not least if one is interested in how much the linear map represented by A changes the norm of a vector one can compute A x, A x = A T A x, x. A positive times a positive will always. To quickly open this page: Windows Chrome: on top right click More > More Tools > Create shortcut. All other things being roughly equal, a 2x zoom will have better optical quality than a 8x zoom. arccos 1 = cos-1 1 = 0 rad = 0° See: Arccos function. Understand Negative numbers, one step at a time. times x in Algebra? Multiplying Variables. What is twice in maths? 2 * 2 = 6 How do you do math fast? There is no one definitive answer to this question ” it depends on your own strengths and weaknesses. And one and a half times more should be 1. This calculator also displays a simple solution to enhance your understanding. In order to simply ‘multiply’ or ‘times’ a given number, you add the given number to itself a number of times, for instance, 4 multiplied by 3 is the same as saying 4 + 4 + 4 = 12. Wiki User ∙ 2011-04-10 00:05:19 This answer is: Study guides Algebra 20 cards A polynomial of degree zero is a constant term. Example: x+y=7; x+2y=11 @ (3,4). f (8)=78−5=56−5=51 → If substitute x by 8, this is what we get. Multiplication Calculator. X 1/2 = root x so when you see x 2/2 is the same as (root x) 2 or root (x 2 )so it does make sense. Wiki User ∙ 2011-04-10 00:05:19 This answer is: Study guides Algebra 20 cards A polynomial of degree zero is a constant term The grouping method of. When the cosine of y is equal to x: cos y = x. x T A A T x = ( A T x) T ( A T x) > 0 Then we have: A matrix is positive definite if and only if its the Gram matrix of a linear independent set of vectors. What is x times x equal to in algebra? To solve x multiplied by x, try to observe the pattern created by letting x be any number. 5 ≥ 4, x ≥ y means x is greater than or equal to y. Equivalent expressions are expressions that work the same even though they look different. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Algebra Calculator Tutorial. If x is equal to 6 and the relation ship between y and x can be shown by the relation y is equal to four times x, y must equal 6 multiplied by. Multiplying Negatives Makes A Positive>Multiplying Negatives Makes A Positive. Math Expression Renderer, Plots, Unit Converter, Equation Solver, Complex Numbers, Calculation History. The reason is that the pivots of B are always at the main diagonal: see the first reference. g of x is equal to x to the third power plus 4x. f of x is equal to 7x minus 5. Scientific calculator online with fraction. In math terms: x*x = x^2 In words: x times x equals x squared. Eight divided by four is 2, therefore x is equal to 2. , x squared equals x multiplied by itself. In algebra, x x multiplied by x x can be written as x ×x x × x (or) x⋅ x x ⋅ x (or) xx x x (or) x(x) x ( x) x x squared symbol is x2 x 2. f (x)=7x−5 → This our function with just x. Multiply A on the left with A T, giving B = A T A. sin(x y) = sin x cos y cos x sin y. If all of the terms in the two. In algebra when two symbols that stand for a number are placed beside each other the operation between them is taken to be multiplication. sin ^2 (x) + cos ^2 (x) = 1. , x squared equals x multiplied by itself. Solve the system: /begin {array} {l} {/frac {2} {9} /cdot x-5y = /frac {1} {9}} //. In words: x times x equals x squared. Equivalent expressions are expressions that work the same even though they look different. For example, (3 + 5)2 = 82 = 64, but this is NOT equal to 32 + 52 = 9 + 25 = 34. tan ^2 (x) + 1 = sec ^2 (x). What does x times x equal?. So: Just write x and x^T$ as matrices and use the usual way of multiplying them. Khan Academy>Zero product property (video). To find the value of unknown coefficients: Distribute any coefficients on each side of the equation. What does x plus x equal?. x squared is a notation that is used to represent the expression x ×x x × x. Anything times 1 is itself. 1 ⋅ x = x OR: 0 + x = x 1 + x = 1 XOR: 0 ⊕ x = x 1 ⊕ x = x One variable NOT: NOT x = x AND: x ⋅ x = x x ⋅ x = 0 OR: x + x = x x + x = 1 XOR: x ⊕ x = 0 x ⊕ x = 1 XOR XOR can be defined in terms of AND, OR, NOT: x ⊕ y = ( x ⋅ y) + ( x ⋅ y) x ⊕ y = ( x + y) ⋅ ( x + y) x ⊕ y = ( x + y) ⋅ (x ⋅ y) Commutativity AND: x ⋅ y = y ⋅ x OR: x + y = y + x. tan(2x) = 2 tan(x) / (1. Zero product property (video). X Times X Squared Calculator. A negative times a positive will always equal a negative number. While 10% more means 1. sin ^2 (x) + cos ^2 (x) = 1. Last but not least if one is interested in how much the linear map represented by A changes the norm of a vector one can compute A x, A x = A T A x, x. X 1/2 = root x so when you see x 2/2 is the same as (root x) 2 or root (x 2 )so it does make sense. Please use at your own risk, and please alert us if something isnt working. greater than or equal to. Keep on reading to know what does e equal to and. In contrast, 2x means x is multiplied by 2. Type your algebra problem into the text box. To check an answer to a system of equations containing x and y, enter the two equations separated by a semicolon, followed by the @ sign and an ordered pair containing your x-value and y-value. ln2x = lnx2 → (lnx)2 = 2lnx ∴ lnx ⋅ lnx = 2lnx Since lnx ≠ 0 lnx ⋅ lnx = 2 ⋅ lnx lnx = 2 x = e2. Example: x+y=7;.