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Simplifying (2x + -1)(x + 9) = 0 Reorder the terms: (-1 + 2x)(x + 9) = 0 Reorder the terms: (-1 + 2x)(9 + x) = 0 Multiply (-1 + 2x) * (9 + x) (-1(9 + x) + 2x * (9 + x)) = 0 ((9 * -1 + x * -1) + 2x * (9 + x)) = 0 ((-9 + -1x) + 2x * (9 + x)) = 0 (-9 + -1x + (9 * 2x + x * 2x)) = 0 (-9 + -1x + (18x + 2x2)) = 0 Combine like terms: -1x + 18x = 17x (-9 + 17x + 2x2) = 0 Solving -9 + 17x + 2x2 = 0 Solving for variable 'x'. Factor a trinomial. (-9 + -1x)(1 + -2x) = 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 '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5Solution
x = {-9, 0.5}
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