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Simplifying 240 = (3x + 9)(x + 5) Reorder the terms: 240 = (9 + 3x)(x + 5) Reorder the terms: 240 = (9 + 3x)(5 + x) Multiply (9 + 3x) * (5 + x) 240 = (9(5 + x) + 3x * (5 + x)) 240 = ((5 * 9 + x * 9) + 3x * (5 + x)) 240 = ((45 + 9x) + 3x * (5 + x)) 240 = (45 + 9x + (5 * 3x + x * 3x)) 240 = (45 + 9x + (15x + 3x2)) Combine like terms: 9x + 15x = 24x 240 = (45 + 24x + 3x2) Solving 240 = 45 + 24x + 3x2 Solving for variable 'x'. Combine like terms: 240 + -45 = 195 195 + -24x + -3x2 = 45 + 24x + 3x2 + -45 + -24x + -3x2 Reorder the terms: 195 + -24x + -3x2 = 45 + -45 + 24x + -24x + 3x2 + -3x2 Combine like terms: 45 + -45 = 0 195 + -24x + -3x2 = 0 + 24x + -24x + 3x2 + -3x2 195 + -24x + -3x2 = 24x + -24x + 3x2 + -3x2 Combine like terms: 24x + -24x = 0 195 + -24x + -3x2 = 0 + 3x2 + -3x2 195 + -24x + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 195 + -24x + -3x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(65 + -8x + -1x2) = 0 Factor a trinomial. 3((5 + -1x)(13 + x)) = 0 Ignore the factor 3.Subproblem 1
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 = 5Subproblem 2
Set the factor '(13 + x)' equal to zero and attempt to solve: Simplifying 13 + x = 0 Solving 13 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = 0 + -13 Combine like terms: 13 + -13 = 0 0 + x = 0 + -13 x = 0 + -13 Combine like terms: 0 + -13 = -13 x = -13 Simplifying x = -13Solution
x = {5, -13}
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