99=x^2-2x

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


Simplifying
99 = x2 + -2x

Reorder the terms:
99 = -2x + x2

Solving
99 = -2x + x2

Solving for variable 'x'.

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

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

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

Factor a trinomial.
(11 + -1x)(9 + x) = 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 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 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 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {11, -9}

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