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Simplifying (5x + 7)(8x + -7) = 0 Reorder the terms: (7 + 5x)(8x + -7) = 0 Reorder the terms: (7 + 5x)(-7 + 8x) = 0 Multiply (7 + 5x) * (-7 + 8x) (7(-7 + 8x) + 5x * (-7 + 8x)) = 0 ((-7 * 7 + 8x * 7) + 5x * (-7 + 8x)) = 0 ((-49 + 56x) + 5x * (-7 + 8x)) = 0 (-49 + 56x + (-7 * 5x + 8x * 5x)) = 0 (-49 + 56x + (-35x + 40x2)) = 0 Combine like terms: 56x + -35x = 21x (-49 + 21x + 40x2) = 0 Solving -49 + 21x + 40x2 = 0 Solving for variable 'x'. Factor a trinomial. (-7 + -5x)(7 + -8x) = 0Subproblem 1
Set the factor '(-7 + -5x)' equal to zero and attempt to solve: Simplifying -7 + -5x = 0 Solving -7 + -5x = 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 + -5x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -5x = 0 + 7 -5x = 0 + 7 Combine like terms: 0 + 7 = 7 -5x = 7 Divide each side by '-5'. x = -1.4 Simplifying x = -1.4Subproblem 2
Set the factor '(7 + -8x)' equal to zero and attempt to solve: Simplifying 7 + -8x = 0 Solving 7 + -8x = 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 + -8x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -8x = 0 + -7 -8x = 0 + -7 Combine like terms: 0 + -7 = -7 -8x = -7 Divide each side by '-8'. x = 0.875 Simplifying x = 0.875Solution
x = {-1.4, 0.875}
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