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Simplifying 0 = 8x2 + -53x + -21 Reorder the terms: 0 = -21 + -53x + 8x2 Solving 0 = -21 + -53x + 8x2 Solving for variable 'x'. Combine like terms: 0 + 21 = 21 21 + 53x + -8x2 = -21 + -53x + 8x2 + 21 + 53x + -8x2 Reorder the terms: 21 + 53x + -8x2 = -21 + 21 + -53x + 53x + 8x2 + -8x2 Combine like terms: -21 + 21 = 0 21 + 53x + -8x2 = 0 + -53x + 53x + 8x2 + -8x2 21 + 53x + -8x2 = -53x + 53x + 8x2 + -8x2 Combine like terms: -53x + 53x = 0 21 + 53x + -8x2 = 0 + 8x2 + -8x2 21 + 53x + -8x2 = 8x2 + -8x2 Combine like terms: 8x2 + -8x2 = 0 21 + 53x + -8x2 = 0 Factor a trinomial. (7 + -1x)(3 + 8x) = 0Subproblem 1
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Subproblem 2
Set the factor '(3 + 8x)' equal to zero and attempt to solve: Simplifying 3 + 8x = 0 Solving 3 + 8x = 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 + 8x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 8x = 0 + -3 8x = 0 + -3 Combine like terms: 0 + -3 = -3 8x = -3 Divide each side by '8'. x = -0.375 Simplifying x = -0.375Solution
x = {7, -0.375}
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