0=8x^2+12x-56

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Solution for 0=8x^2+12x-56 equation:


Simplifying
0 = 8x2 + 12x + -56

Reorder the terms:
0 = -56 + 12x + 8x2

Solving
0 = -56 + 12x + 8x2

Solving for variable 'x'.

Combine like terms: 0 + 56 = 56
56 + -12x + -8x2 = -56 + 12x + 8x2 + 56 + -12x + -8x2

Reorder the terms:
56 + -12x + -8x2 = -56 + 56 + 12x + -12x + 8x2 + -8x2

Combine like terms: -56 + 56 = 0
56 + -12x + -8x2 = 0 + 12x + -12x + 8x2 + -8x2
56 + -12x + -8x2 = 12x + -12x + 8x2 + -8x2

Combine like terms: 12x + -12x = 0
56 + -12x + -8x2 = 0 + 8x2 + -8x2
56 + -12x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
56 + -12x + -8x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(14 + -3x + -2x2) = 0

Factor a trinomial.
4((2 + -1x)(7 + 2x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Subproblem 2

Set the factor '(7 + 2x)' equal to zero and attempt to solve: Simplifying 7 + 2x = 0 Solving 7 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 0 + -7 2x = 0 + -7 Combine like terms: 0 + -7 = -7 2x = -7 Divide each side by '2'. x = -3.5 Simplifying x = -3.5

Solution

x = {2, -3.5}

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