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Simplifying 2x2 + 8x + 16 = 400 Reorder the terms: 16 + 8x + 2x2 = 400 Solving 16 + 8x + 2x2 = 400 Solving for variable 'x'. Reorder the terms: 16 + -400 + 8x + 2x2 = 400 + -400 Combine like terms: 16 + -400 = -384 -384 + 8x + 2x2 = 400 + -400 Combine like terms: 400 + -400 = 0 -384 + 8x + 2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-192 + 4x + x2) = 0 Factor a trinomial. 2((-16 + -1x)(12 + -1x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-16 + -1x)' equal to zero and attempt to solve: Simplifying -16 + -1x = 0 Solving -16 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -1x = 0 + 16 Combine like terms: -16 + 16 = 0 0 + -1x = 0 + 16 -1x = 0 + 16 Combine like terms: 0 + 16 = 16 -1x = 16 Divide each side by '-1'. x = -16 Simplifying x = -16Subproblem 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 = 12Solution
x = {-16, 12}
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