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Simplifying 7x2 + 20x + -20 = 4 + -2x Reorder the terms: -20 + 20x + 7x2 = 4 + -2x Solving -20 + 20x + 7x2 = 4 + -2x Solving for variable 'x'. Reorder the terms: -20 + -4 + 20x + 2x + 7x2 = 4 + -2x + -4 + 2x Combine like terms: -20 + -4 = -24 -24 + 20x + 2x + 7x2 = 4 + -2x + -4 + 2x Combine like terms: 20x + 2x = 22x -24 + 22x + 7x2 = 4 + -2x + -4 + 2x Reorder the terms: -24 + 22x + 7x2 = 4 + -4 + -2x + 2x Combine like terms: 4 + -4 = 0 -24 + 22x + 7x2 = 0 + -2x + 2x -24 + 22x + 7x2 = -2x + 2x Combine like terms: -2x + 2x = 0 -24 + 22x + 7x2 = 0 Factor a trinomial. (-4 + -1x)(6 + -7x) = 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 '(6 + -7x)' equal to zero and attempt to solve: Simplifying 6 + -7x = 0 Solving 6 + -7x = 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 + -7x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -7x = 0 + -6 -7x = 0 + -6 Combine like terms: 0 + -6 = -6 -7x = -6 Divide each side by '-7'. x = 0.8571428571 Simplifying x = 0.8571428571Solution
x = {-4, 0.8571428571}
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