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Simplifying 28x2 = 20x + 8 Reorder the terms: 28x2 = 8 + 20x Solving 28x2 = 8 + 20x Solving for variable 'x'. Reorder the terms: -8 + -20x + 28x2 = 8 + 20x + -8 + -20x Reorder the terms: -8 + -20x + 28x2 = 8 + -8 + 20x + -20x Combine like terms: 8 + -8 = 0 -8 + -20x + 28x2 = 0 + 20x + -20x -8 + -20x + 28x2 = 20x + -20x Combine like terms: 20x + -20x = 0 -8 + -20x + 28x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-2 + -5x + 7x2) = 0 Factor a trinomial. 4((-2 + -7x)(1 + -1x)) = 0 Ignore the factor 4.Subproblem 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 '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 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 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1Solution
x = {-0.2857142857, 1}
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