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Simplifying (3x + -9)(5 + -2x) = 0 Reorder the terms: (-9 + 3x)(5 + -2x) = 0 Multiply (-9 + 3x) * (5 + -2x) (-9(5 + -2x) + 3x * (5 + -2x)) = 0 ((5 * -9 + -2x * -9) + 3x * (5 + -2x)) = 0 ((-45 + 18x) + 3x * (5 + -2x)) = 0 (-45 + 18x + (5 * 3x + -2x * 3x)) = 0 (-45 + 18x + (15x + -6x2)) = 0 Combine like terms: 18x + 15x = 33x (-45 + 33x + -6x2) = 0 Solving -45 + 33x + -6x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(-15 + 11x + -2x2) = 0 Factor a trinomial. 3((-3 + x)(5 + -2x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 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 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Simplifying x = 3Subproblem 2
Set the factor '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5Solution
x = {3, 2.5}
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