2x^2+8x-56=8

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


Simplifying
2x2 + 8x + -56 = 8

Reorder the terms:
-56 + 8x + 2x2 = 8

Solving
-56 + 8x + 2x2 = 8

Solving for variable 'x'.

Reorder the terms:
-56 + -8 + 8x + 2x2 = 8 + -8

Combine like terms: -56 + -8 = -64
-64 + 8x + 2x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-64 + 8x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-32 + 4x + x2) = 0

Factor a trinomial.
2((-8 + -1x)(4 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-8 + -1x)' equal to zero and attempt to solve: Simplifying -8 + -1x = 0 Solving -8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -1x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1x = 0 + 8 -1x = 0 + 8 Combine like terms: 0 + 8 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8

Subproblem 2

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

Solution

x = {-8, 4}

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