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Simplifying 7x2 + -20x + -4 = -8x Reorder the terms: -4 + -20x + 7x2 = -8x Solving -4 + -20x + 7x2 = -8x Solving for variable 'x'. Reorder the terms: -4 + -20x + 8x + 7x2 = -8x + 8x Combine like terms: -20x + 8x = -12x -4 + -12x + 7x2 = -8x + 8x Combine like terms: -8x + 8x = 0 -4 + -12x + 7x2 = 0 Factor a trinomial. (-2 + -7x)(2 + -1x) = 0Subproblem 1
Set the factor '(-2 + -7x)' equal to zero and attempt to solve: Simplifying -2 + -7x = 0 Solving -2 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -7x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -7x = 0 + 2 -7x = 0 + 2 Combine like terms: 0 + 2 = 2 -7x = 2 Divide each side by '-7'. x = -0.2857142857 Simplifying x = -0.2857142857Subproblem 2
Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2Solution
x = {-0.2857142857, 2}
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