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Simplifying 120 = 2x2 + -1x Reorder the terms: 120 = -1x + 2x2 Solving 120 = -1x + 2x2 Solving for variable 'x'. Reorder the terms: 120 + x + -2x2 = -1x + x + 2x2 + -2x2 Combine like terms: -1x + x = 0 120 + x + -2x2 = 0 + 2x2 + -2x2 120 + x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 120 + x + -2x2 = 0 Factor a trinomial. (8 + -1x)(15 + 2x) = 0Subproblem 1
Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 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 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8Subproblem 2
Set the factor '(15 + 2x)' equal to zero and attempt to solve: Simplifying 15 + 2x = 0 Solving 15 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 2x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 2x = 0 + -15 2x = 0 + -15 Combine like terms: 0 + -15 = -15 2x = -15 Divide each side by '2'. x = -7.5 Simplifying x = -7.5Solution
x = {8, -7.5}
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