x^2-x-30=8x+6

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Solution for x^2-x-30=8x+6 equation:


Simplifying
x2 + -1x + -30 = 8x + 6

Reorder the terms:
-30 + -1x + x2 = 8x + 6

Reorder the terms:
-30 + -1x + x2 = 6 + 8x

Solving
-30 + -1x + x2 = 6 + 8x

Solving for variable 'x'.

Reorder the terms:
-30 + -6 + -1x + -8x + x2 = 6 + 8x + -6 + -8x

Combine like terms: -30 + -6 = -36
-36 + -1x + -8x + x2 = 6 + 8x + -6 + -8x

Combine like terms: -1x + -8x = -9x
-36 + -9x + x2 = 6 + 8x + -6 + -8x

Reorder the terms:
-36 + -9x + x2 = 6 + -6 + 8x + -8x

Combine like terms: 6 + -6 = 0
-36 + -9x + x2 = 0 + 8x + -8x
-36 + -9x + x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-36 + -9x + x2 = 0

Factor a trinomial.
(-3 + -1x)(12 + -1x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(12 + -1x)' equal to zero and attempt to solve: Simplifying 12 + -1x = 0 Solving 12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1x = 0 + -12 -1x = 0 + -12 Combine like terms: 0 + -12 = -12 -1x = -12 Divide each side by '-1'. x = 12 Simplifying x = 12

Solution

x = {-3, 12}

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