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Simplifying 4x2 + 20x + -20 = 4 + -9x Reorder the terms: -20 + 20x + 4x2 = 4 + -9x Solving -20 + 20x + 4x2 = 4 + -9x Solving for variable 'x'. Reorder the terms: -20 + -4 + 20x + 9x + 4x2 = 4 + -9x + -4 + 9x Combine like terms: -20 + -4 = -24 -24 + 20x + 9x + 4x2 = 4 + -9x + -4 + 9x Combine like terms: 20x + 9x = 29x -24 + 29x + 4x2 = 4 + -9x + -4 + 9x Reorder the terms: -24 + 29x + 4x2 = 4 + -4 + -9x + 9x Combine like terms: 4 + -4 = 0 -24 + 29x + 4x2 = 0 + -9x + 9x -24 + 29x + 4x2 = -9x + 9x Combine like terms: -9x + 9x = 0 -24 + 29x + 4x2 = 0 Factor a trinomial. (-8 + -1x)(3 + -4x) = 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 '(3 + -4x)' equal to zero and attempt to solve: Simplifying 3 + -4x = 0 Solving 3 + -4x = 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 + -4x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4x = 0 + -3 -4x = 0 + -3 Combine like terms: 0 + -3 = -3 -4x = -3 Divide each side by '-4'. x = 0.75 Simplifying x = 0.75Solution
x = {-8, 0.75}
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