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Simplifying (x + -5)(3x + 9) = 0 Reorder the terms: (-5 + x)(3x + 9) = 0 Reorder the terms: (-5 + x)(9 + 3x) = 0 Multiply (-5 + x) * (9 + 3x) (-5(9 + 3x) + x(9 + 3x)) = 0 ((9 * -5 + 3x * -5) + x(9 + 3x)) = 0 ((-45 + -15x) + x(9 + 3x)) = 0 (-45 + -15x + (9 * x + 3x * x)) = 0 (-45 + -15x + (9x + 3x2)) = 0 Combine like terms: -15x + 9x = -6x (-45 + -6x + 3x2) = 0 Solving -45 + -6x + 3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(-15 + -2x + x2) = 0 Factor a trinomial. 3((-3 + -1x)(5 + -1x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3Subproblem 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 = {-3, 5}
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