-x^2+20=-8x

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Solution for -x^2+20=-8x equation:


Simplifying
-1x2 + 20 = -8x

Reorder the terms:
20 + -1x2 = -8x

Solving
20 + -1x2 = -8x

Solving for variable 'x'.

Reorder the terms:
20 + 8x + -1x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
20 + 8x + -1x2 = 0

Factor a trinomial.
(10 + -1x)(2 + x) = 0

Subproblem 1

Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {10, -2}

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