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Simplifying (5x2 + -15) = (4x2 + -2x) Reorder the terms: (-15 + 5x2) = (4x2 + -2x) Remove parenthesis around (-15 + 5x2) -15 + 5x2 = (4x2 + -2x) Reorder the terms: -15 + 5x2 = (-2x + 4x2) Remove parenthesis around (-2x + 4x2) -15 + 5x2 = -2x + 4x2 Solving -15 + 5x2 = -2x + 4x2 Solving for variable 'x'. Reorder the terms: -15 + 2x + 5x2 + -4x2 = -2x + 4x2 + 2x + -4x2 Combine like terms: 5x2 + -4x2 = 1x2 -15 + 2x + 1x2 = -2x + 4x2 + 2x + -4x2 Reorder the terms: -15 + 2x + 1x2 = -2x + 2x + 4x2 + -4x2 Combine like terms: -2x + 2x = 0 -15 + 2x + 1x2 = 0 + 4x2 + -4x2 -15 + 2x + 1x2 = 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -15 + 2x + 1x2 = 0 Factor a trinomial. (-5 + -1x)(3 + -1x) = 0Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5Subproblem 2
Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 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 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3Solution
x = {-5, 3}
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