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Simplifying 2x(x + 4) + -1(x + 4) = 0 Reorder the terms: 2x(4 + x) + -1(x + 4) = 0 (4 * 2x + x * 2x) + -1(x + 4) = 0 (8x + 2x2) + -1(x + 4) = 0 Reorder the terms: 8x + 2x2 + -1(4 + x) = 0 8x + 2x2 + (4 * -1 + x * -1) = 0 8x + 2x2 + (-4 + -1x) = 0 Reorder the terms: -4 + 8x + -1x + 2x2 = 0 Combine like terms: 8x + -1x = 7x -4 + 7x + 2x2 = 0 Solving -4 + 7x + 2x2 = 0 Solving for variable 'x'. Factor a trinomial. (-4 + -1x)(1 + -2x) = 0Subproblem 1
Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4Subproblem 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 = {-4, 0.5}
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