2x^2+12x=x-9

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Solution for 2x^2+12x=x-9 equation:


Simplifying
2x2 + 12x = x + -9

Reorder the terms:
12x + 2x2 = x + -9

Reorder the terms:
12x + 2x2 = -9 + x

Solving
12x + 2x2 = -9 + x

Solving for variable 'x'.

Reorder the terms:
9 + 12x + -1x + 2x2 = -9 + x + 9 + -1x

Combine like terms: 12x + -1x = 11x
9 + 11x + 2x2 = -9 + x + 9 + -1x

Reorder the terms:
9 + 11x + 2x2 = -9 + 9 + x + -1x

Combine like terms: -9 + 9 = 0
9 + 11x + 2x2 = 0 + x + -1x
9 + 11x + 2x2 = x + -1x

Combine like terms: x + -1x = 0
9 + 11x + 2x2 = 0

Factor a trinomial.
(9 + 2x)(1 + x) = 0

Subproblem 1

Set the factor '(9 + 2x)' equal to zero and attempt to solve: Simplifying 9 + 2x = 0 Solving 9 + 2x = 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 + 2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 0 + -9 2x = 0 + -9 Combine like terms: 0 + -9 = -9 2x = -9 Divide each side by '2'. x = -4.5 Simplifying x = -4.5

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 = {-4.5, -1}

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