0=8x^2-12x-36

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Solution for 0=8x^2-12x-36 equation:


Simplifying
0 = 8x2 + -12x + -36

Reorder the terms:
0 = -36 + -12x + 8x2

Solving
0 = -36 + -12x + 8x2

Solving for variable 'x'.

Combine like terms: 0 + 36 = 36
36 + 12x + -8x2 = -36 + -12x + 8x2 + 36 + 12x + -8x2

Reorder the terms:
36 + 12x + -8x2 = -36 + 36 + -12x + 12x + 8x2 + -8x2

Combine like terms: -36 + 36 = 0
36 + 12x + -8x2 = 0 + -12x + 12x + 8x2 + -8x2
36 + 12x + -8x2 = -12x + 12x + 8x2 + -8x2

Combine like terms: -12x + 12x = 0
36 + 12x + -8x2 = 0 + 8x2 + -8x2
36 + 12x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
36 + 12x + -8x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(9 + 3x + -2x2) = 0

Factor a trinomial.
4((3 + -1x)(3 + 2x)) = 0

Ignore the factor 4.

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 '(3 + 2x)' equal to zero and attempt to solve: Simplifying 3 + 2x = 0 Solving 3 + 2x = 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 + 2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 0 + -3 2x = 0 + -3 Combine like terms: 0 + -3 = -3 2x = -3 Divide each side by '2'. x = -1.5 Simplifying x = -1.5

Solution

x = {3, -1.5}

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