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Simplifying -3x(x + 2) + -8(x + 2) = 0 Reorder the terms: -3x(2 + x) + -8(x + 2) = 0 (2 * -3x + x * -3x) + -8(x + 2) = 0 (-6x + -3x2) + -8(x + 2) = 0 Reorder the terms: -6x + -3x2 + -8(2 + x) = 0 -6x + -3x2 + (2 * -8 + x * -8) = 0 -6x + -3x2 + (-16 + -8x) = 0 Reorder the terms: -16 + -6x + -8x + -3x2 = 0 Combine like terms: -6x + -8x = -14x -16 + -14x + -3x2 = 0 Solving -16 + -14x + -3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(16 + 14x + 3x2) = 0 Factor a trinomial. -1((8 + 3x)(2 + x)) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(8 + 3x)' equal to zero and attempt to solve: Simplifying 8 + 3x = 0 Solving 8 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 3x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 3x = 0 + -8 3x = 0 + -8 Combine like terms: 0 + -8 = -8 3x = -8 Divide each side by '3'. x = -2.666666667 Simplifying x = -2.666666667Subproblem 2
Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 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 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2Solution
x = {-2.666666667, -2}
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