SOLUTION: The sum of an integer and the square of its additive inverse is 56. What is the number?

SOLUTION: The sum of an integer and the square of its additive inverse is 56. What is the number?

Algebra.Com

Question 252206: The sum of an integer and the square of its additive inverse is 56. What is the number?
Answer by hokies(65) (Show Source): You can put this solution on YOUR website!
x + (-x)^2 = 56
x^2 + x - 56 = 0
(x+8)*(x-7)=0
x = -8 or x = 7
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