-x=56-x^2

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Solution for -x=56-x^2 equation:


Simplifying
-1x = 56 + -1x2

Solving
-1x = 56 + -1x2

Solving for variable 'x'.

Reorder the terms:
-56 + -1x + x2 = 56 + -1x2 + -56 + x2

Reorder the terms:
-56 + -1x + x2 = 56 + -56 + -1x2 + x2

Combine like terms: 56 + -56 = 0
-56 + -1x + x2 = 0 + -1x2 + x2
-56 + -1x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-56 + -1x + x2 = 0

Factor a trinomial.
(-7 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {-7, 8}

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