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Simplifying (8x + 7) * 4x = 15 Reorder the terms: (7 + 8x) * 4x = 15 Reorder the terms for easier multiplication: 4x(7 + 8x) = 15 (7 * 4x + 8x * 4x) = 15 (28x + 32x2) = 15 Solving 28x + 32x2 = 15 Solving for variable 'x'. Reorder the terms: -15 + 28x + 32x2 = 15 + -15 Combine like terms: 15 + -15 = 0 -15 + 28x + 32x2 = 0 Factor a trinomial. (-5 + -4x)(3 + -8x) = 0Subproblem 1
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 = -1.25Subproblem 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 = {-1.25, 0.375}
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