x^2+2x=9-6x

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Solution for x^2+2x=9-6x equation:


Simplifying
x2 + 2x = 9 + -6x

Reorder the terms:
2x + x2 = 9 + -6x

Solving
2x + x2 = 9 + -6x

Solving for variable 'x'.

Reorder the terms:
-9 + 2x + 6x + x2 = 9 + -6x + -9 + 6x

Combine like terms: 2x + 6x = 8x
-9 + 8x + x2 = 9 + -6x + -9 + 6x

Reorder the terms:
-9 + 8x + x2 = 9 + -9 + -6x + 6x

Combine like terms: 9 + -9 = 0
-9 + 8x + x2 = 0 + -6x + 6x
-9 + 8x + x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
-9 + 8x + x2 = 0

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

Solution

x = {-9, 1}

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