x^2=-10x-9

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Solution for x^2=-10x-9 equation:


Simplifying
x2 = -10x + -9

Reorder the terms:
x2 = -9 + -10x

Solving
x2 = -9 + -10x

Solving for variable 'x'.

Reorder the terms:
9 + 10x + x2 = -9 + -10x + 9 + 10x

Reorder the terms:
9 + 10x + x2 = -9 + 9 + -10x + 10x

Combine like terms: -9 + 9 = 0
9 + 10x + x2 = 0 + -10x + 10x
9 + 10x + x2 = -10x + 10x

Combine like terms: -10x + 10x = 0
9 + 10x + x2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

x = {-9, -1}

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