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Simplifying 0 = x(x + 5)(x + -8) Reorder the terms: 0 = x(5 + x)(x + -8) Reorder the terms: 0 = x(5 + x)(-8 + x) Multiply (5 + x) * (-8 + x) 0 = x(5(-8 + x) + x(-8 + x)) 0 = x((-8 * 5 + x * 5) + x(-8 + x)) 0 = x((-40 + 5x) + x(-8 + x)) 0 = x(-40 + 5x + (-8 * x + x * x)) 0 = x(-40 + 5x + (-8x + x2)) Combine like terms: 5x + -8x = -3x 0 = x(-40 + -3x + x2) 0 = (-40 * x + -3x * x + x2 * x) 0 = (-40x + -3x2 + x3) Solving 0 = -40x + -3x2 + x3 Solving for variable 'x'. Remove the zero: 40x + 3x2 + -1x3 = -40x + -3x2 + x3 + 40x + 3x2 + -1x3 Reorder the terms: 40x + 3x2 + -1x3 = -40x + 40x + -3x2 + 3x2 + x3 + -1x3 Combine like terms: -40x + 40x = 0 40x + 3x2 + -1x3 = 0 + -3x2 + 3x2 + x3 + -1x3 40x + 3x2 + -1x3 = -3x2 + 3x2 + x3 + -1x3 Combine like terms: -3x2 + 3x2 = 0 40x + 3x2 + -1x3 = 0 + x3 + -1x3 40x + 3x2 + -1x3 = x3 + -1x3 Combine like terms: x3 + -1x3 = 0 40x + 3x2 + -1x3 = 0 Factor out the Greatest Common Factor (GCF), 'x'. x(40 + 3x + -1x2) = 0 Factor a trinomial. x((8 + -1x)(5 + x)) = 0Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
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 = 8Subproblem 3
Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 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 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5Solution
x = {0, 8, -5}
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