-x^2=2x-99

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Solution for -x^2=2x-99 equation:


Simplifying
-1x2 = 2x + -99

Reorder the terms:
-1x2 = -99 + 2x

Solving
-1x2 = -99 + 2x

Solving for variable 'x'.

Reorder the terms:
99 + -2x + -1x2 = -99 + 2x + 99 + -2x

Reorder the terms:
99 + -2x + -1x2 = -99 + 99 + 2x + -2x

Combine like terms: -99 + 99 = 0
99 + -2x + -1x2 = 0 + 2x + -2x
99 + -2x + -1x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
99 + -2x + -1x2 = 0

Factor a trinomial.
(9 + -1x)(11 + x) = 0

Subproblem 1

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Subproblem 2

Set the factor '(11 + x)' equal to zero and attempt to solve: Simplifying 11 + x = 0 Solving 11 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 0 + -11 Combine like terms: 11 + -11 = 0 0 + x = 0 + -11 x = 0 + -11 Combine like terms: 0 + -11 = -11 x = -11 Simplifying x = -11

Solution

x = {9, -11}

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