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Simplifying 4x2 + -28 = 5x2 + 16x Reorder the terms: -28 + 4x2 = 5x2 + 16x Reorder the terms: -28 + 4x2 = 16x + 5x2 Solving -28 + 4x2 = 16x + 5x2 Solving for variable 'x'. Reorder the terms: -28 + -16x + 4x2 + -5x2 = 16x + 5x2 + -16x + -5x2 Combine like terms: 4x2 + -5x2 = -1x2 -28 + -16x + -1x2 = 16x + 5x2 + -16x + -5x2 Reorder the terms: -28 + -16x + -1x2 = 16x + -16x + 5x2 + -5x2 Combine like terms: 16x + -16x = 0 -28 + -16x + -1x2 = 0 + 5x2 + -5x2 -28 + -16x + -1x2 = 5x2 + -5x2 Combine like terms: 5x2 + -5x2 = 0 -28 + -16x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(28 + 16x + x2) = 0 Factor a trinomial. -1((14 + x)(2 + x)) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(14 + x)' equal to zero and attempt to solve: Simplifying 14 + x = 0 Solving 14 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + x = 0 + -14 x = 0 + -14 Combine like terms: 0 + -14 = -14 x = -14 Simplifying x = -14Subproblem 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 = {-14, -2}
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