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Simplifying 16x2 + 32x + 16 = 81 Reorder the terms: 16 + 32x + 16x2 = 81 Solving 16 + 32x + 16x2 = 81 Solving for variable 'x'. Reorder the terms: 16 + -81 + 32x + 16x2 = 81 + -81 Combine like terms: 16 + -81 = -65 -65 + 32x + 16x2 = 81 + -81 Combine like terms: 81 + -81 = 0 -65 + 32x + 16x2 = 0 Factor a trinomial. (-13 + -4x)(5 + -4x) = 0Subproblem 1
Set the factor '(-13 + -4x)' equal to zero and attempt to solve: Simplifying -13 + -4x = 0 Solving -13 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -4x = 0 + 13 Combine like terms: -13 + 13 = 0 0 + -4x = 0 + 13 -4x = 0 + 13 Combine like terms: 0 + 13 = 13 -4x = 13 Divide each side by '-4'. x = -3.25 Simplifying x = -3.25Subproblem 2
Set the factor '(5 + -4x)' equal to zero and attempt to solve: Simplifying 5 + -4x = 0 Solving 5 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4x = 0 + -5 -4x = 0 + -5 Combine like terms: 0 + -5 = -5 -4x = -5 Divide each side by '-4'. x = 1.25 Simplifying x = 1.25Solution
x = {-3.25, 1.25}
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