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Simplifying (x + -3)(x + 18) = 12x Reorder the terms: (-3 + x)(x + 18) = 12x Reorder the terms: (-3 + x)(18 + x) = 12x Multiply (-3 + x) * (18 + x) (-3(18 + x) + x(18 + x)) = 12x ((18 * -3 + x * -3) + x(18 + x)) = 12x ((-54 + -3x) + x(18 + x)) = 12x (-54 + -3x + (18 * x + x * x)) = 12x (-54 + -3x + (18x + x2)) = 12x Combine like terms: -3x + 18x = 15x (-54 + 15x + x2) = 12x Solving -54 + 15x + x2 = 12x Solving for variable 'x'. Reorder the terms: -54 + 15x + -12x + x2 = 12x + -12x Combine like terms: 15x + -12x = 3x -54 + 3x + x2 = 12x + -12x Combine like terms: 12x + -12x = 0 -54 + 3x + x2 = 0 Factor a trinomial. (-9 + -1x)(6 + -1x) = 0Subproblem 1
Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9Subproblem 2
Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6Solution
x = {-9, 6}
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