The sum of a number and its square is 42. which equation can be used to find the two numbers for which this is true? x2 x = 42 x2 2x = 42 x2 x 42 = 0 x2 2x 42 = 0

Using the word sum means that you will be adding the number and its square. In this case, let the number equal x. The square of x is found by multiplying x by itself. This can be written as (x)(x) = x2 (or x^2). Adding the number and its square to get 42 is now expressed as x2 + x = 42. This could also be written as x2 + x - 42 = 0 by subtracting 42 from each side.

 x2 + x = 42 is the answer

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