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Simplifying 0 = x2 + 12x + -45 Reorder the terms: 0 = -45 + 12x + x2 Solving 0 = -45 + 12x + x2 Solving for variable 'x'. Combine like terms: 0 + 45 = 45 45 + -12x + -1x2 = -45 + 12x + x2 + 45 + -12x + -1x2 Reorder the terms: 45 + -12x + -1x2 = -45 + 45 + 12x + -12x + x2 + -1x2 Combine like terms: -45 + 45 = 0 45 + -12x + -1x2 = 0 + 12x + -12x + x2 + -1x2 45 + -12x + -1x2 = 12x + -12x + x2 + -1x2 Combine like terms: 12x + -12x = 0 45 + -12x + -1x2 = 0 + x2 + -1x2 45 + -12x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 45 + -12x + -1x2 = 0 Factor a trinomial. (3 + -1x)(15 + x) = 0Subproblem 1
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 = 3Subproblem 2
Set the factor '(15 + x)' equal to zero and attempt to solve: Simplifying 15 + x = 0 Solving 15 + x = 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 + x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + x = 0 + -15 x = 0 + -15 Combine like terms: 0 + -15 = -15 x = -15 Simplifying x = -15Solution
x = {3, -15}
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