x^2+2x=x+12

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


Simplifying
x2 + 2x = x + 12

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

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

Solving
2x + x2 = 12 + x

Solving for variable 'x'.

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

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

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

Combine like terms: 12 + -12 = 0
-12 + 1x + x2 = 0 + x + -1x
-12 + 1x + x2 = x + -1x

Combine like terms: x + -1x = 0
-12 + 1x + x2 = 0

Factor a trinomial.
(-4 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-4, 3}

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