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Simplifying (2x + 5)(3x + -4) = 9x + 8 Reorder the terms: (5 + 2x)(3x + -4) = 9x + 8 Reorder the terms: (5 + 2x)(-4 + 3x) = 9x + 8 Multiply (5 + 2x) * (-4 + 3x) (5(-4 + 3x) + 2x * (-4 + 3x)) = 9x + 8 ((-4 * 5 + 3x * 5) + 2x * (-4 + 3x)) = 9x + 8 ((-20 + 15x) + 2x * (-4 + 3x)) = 9x + 8 (-20 + 15x + (-4 * 2x + 3x * 2x)) = 9x + 8 (-20 + 15x + (-8x + 6x2)) = 9x + 8 Combine like terms: 15x + -8x = 7x (-20 + 7x + 6x2) = 9x + 8 Reorder the terms: -20 + 7x + 6x2 = 8 + 9x Solving -20 + 7x + 6x2 = 8 + 9x Solving for variable 'x'. Reorder the terms: -20 + -8 + 7x + -9x + 6x2 = 8 + 9x + -8 + -9x Combine like terms: -20 + -8 = -28 -28 + 7x + -9x + 6x2 = 8 + 9x + -8 + -9x Combine like terms: 7x + -9x = -2x -28 + -2x + 6x2 = 8 + 9x + -8 + -9x Reorder the terms: -28 + -2x + 6x2 = 8 + -8 + 9x + -9x Combine like terms: 8 + -8 = 0 -28 + -2x + 6x2 = 0 + 9x + -9x -28 + -2x + 6x2 = 9x + -9x Combine like terms: 9x + -9x = 0 -28 + -2x + 6x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-14 + -1x + 3x2) = 0 Factor a trinomial. 2((-2 + -1x)(7 + -3x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
Set the factor '(7 + -3x)' equal to zero and attempt to solve: Simplifying 7 + -3x = 0 Solving 7 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -3x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 0 + -7 -3x = 0 + -7 Combine like terms: 0 + -7 = -7 -3x = -7 Divide each side by '-3'. x = 2.333333333 Simplifying x = 2.333333333Solution
x = {-2, 2.333333333}
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