0=-x^2-2x+99

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Solution for 0=-x^2-2x+99 equation:


Simplifying
0 = -1x2 + -2x + 99

Reorder the terms:
0 = 99 + -2x + -1x2

Solving
0 = 99 + -2x + -1x2

Solving for variable 'x'.

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

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

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

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

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

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

Subproblem 1

Set the factor '(-11 + -1x)' equal to zero and attempt to solve: Simplifying -11 + -1x = 0 Solving -11 + -1x = 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 + -1x = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -1x = 0 + 11 -1x = 0 + 11 Combine like terms: 0 + 11 = 11 -1x = 11 Divide each side by '-1'. x = -11 Simplifying x = -11

Subproblem 2

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

Solution

x = {-11, 9}

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