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Simplifying (x + 3)(5 + -2x) = (x + 3)(7 + x) Reorder the terms: (3 + x)(5 + -2x) = (x + 3)(7 + x) Multiply (3 + x) * (5 + -2x) (3(5 + -2x) + x(5 + -2x)) = (x + 3)(7 + x) ((5 * 3 + -2x * 3) + x(5 + -2x)) = (x + 3)(7 + x) ((15 + -6x) + x(5 + -2x)) = (x + 3)(7 + x) (15 + -6x + (5 * x + -2x * x)) = (x + 3)(7 + x) (15 + -6x + (5x + -2x2)) = (x + 3)(7 + x) Combine like terms: -6x + 5x = -1x (15 + -1x + -2x2) = (x + 3)(7 + x) Reorder the terms: 15 + -1x + -2x2 = (3 + x)(7 + x) Multiply (3 + x) * (7 + x) 15 + -1x + -2x2 = (3(7 + x) + x(7 + x)) 15 + -1x + -2x2 = ((7 * 3 + x * 3) + x(7 + x)) 15 + -1x + -2x2 = ((21 + 3x) + x(7 + x)) 15 + -1x + -2x2 = (21 + 3x + (7 * x + x * x)) 15 + -1x + -2x2 = (21 + 3x + (7x + x2)) Combine like terms: 3x + 7x = 10x 15 + -1x + -2x2 = (21 + 10x + x2) Solving 15 + -1x + -2x2 = 21 + 10x + x2 Solving for variable 'x'. Reorder the terms: 15 + -21 + -1x + -10x + -2x2 + -1x2 = 21 + 10x + x2 + -21 + -10x + -1x2 Combine like terms: 15 + -21 = -6 -6 + -1x + -10x + -2x2 + -1x2 = 21 + 10x + x2 + -21 + -10x + -1x2 Combine like terms: -1x + -10x = -11x -6 + -11x + -2x2 + -1x2 = 21 + 10x + x2 + -21 + -10x + -1x2 Combine like terms: -2x2 + -1x2 = -3x2 -6 + -11x + -3x2 = 21 + 10x + x2 + -21 + -10x + -1x2 Reorder the terms: -6 + -11x + -3x2 = 21 + -21 + 10x + -10x + x2 + -1x2 Combine like terms: 21 + -21 = 0 -6 + -11x + -3x2 = 0 + 10x + -10x + x2 + -1x2 -6 + -11x + -3x2 = 10x + -10x + x2 + -1x2 Combine like terms: 10x + -10x = 0 -6 + -11x + -3x2 = 0 + x2 + -1x2 -6 + -11x + -3x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -6 + -11x + -3x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(6 + 11x + 3x2) = 0 Factor a trinomial. -1((3 + x)(2 + 3x)) = 0 Ignore the factor -1.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 '(2 + 3x)' equal to zero and attempt to solve: Simplifying 2 + 3x = 0 Solving 2 + 3x = 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 + 3x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3x = 0 + -2 3x = 0 + -2 Combine like terms: 0 + -2 = -2 3x = -2 Divide each side by '3'. x = -0.6666666667 Simplifying x = -0.6666666667Solution
x = {-3, -0.6666666667}
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