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Simplifying (x + -5)(2x + 8) = 0 Reorder the terms: (-5 + x)(2x + 8) = 0 Reorder the terms: (-5 + x)(8 + 2x) = 0 Multiply (-5 + x) * (8 + 2x) (-5(8 + 2x) + x(8 + 2x)) = 0 ((8 * -5 + 2x * -5) + x(8 + 2x)) = 0 ((-40 + -10x) + x(8 + 2x)) = 0 (-40 + -10x + (8 * x + 2x * x)) = 0 (-40 + -10x + (8x + 2x2)) = 0 Combine like terms: -10x + 8x = -2x (-40 + -2x + 2x2) = 0 Solving -40 + -2x + 2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(-20 + -1x + x2) = 0 Factor a trinomial. 2((-4 + -1x)(5 + -1x)) = 0 Ignore the factor 2.Subproblem 1
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 = -4Subproblem 2
Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5Solution
x = {-4, 5}
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