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Simplifying (9x + -7)(5x + 9) = 0 Reorder the terms: (-7 + 9x)(5x + 9) = 0 Reorder the terms: (-7 + 9x)(9 + 5x) = 0 Multiply (-7 + 9x) * (9 + 5x) (-7(9 + 5x) + 9x * (9 + 5x)) = 0 ((9 * -7 + 5x * -7) + 9x * (9 + 5x)) = 0 ((-63 + -35x) + 9x * (9 + 5x)) = 0 (-63 + -35x + (9 * 9x + 5x * 9x)) = 0 (-63 + -35x + (81x + 45x2)) = 0 Combine like terms: -35x + 81x = 46x (-63 + 46x + 45x2) = 0 Solving -63 + 46x + 45x2 = 0 Solving for variable 'x'. Factor a trinomial. (-9 + -5x)(7 + -9x) = 0Subproblem 1
Set the factor '(-9 + -5x)' equal to zero and attempt to solve: Simplifying -9 + -5x = 0 Solving -9 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -5x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -5x = 0 + 9 -5x = 0 + 9 Combine like terms: 0 + 9 = 9 -5x = 9 Divide each side by '-5'. x = -1.8 Simplifying x = -1.8Subproblem 2
Set the factor '(7 + -9x)' equal to zero and attempt to solve: Simplifying 7 + -9x = 0 Solving 7 + -9x = 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 + -9x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -9x = 0 + -7 -9x = 0 + -7 Combine like terms: 0 + -7 = -7 -9x = -7 Divide each side by '-9'. x = 0.7777777778 Simplifying x = 0.7777777778Solution
x = {-1.8, 0.7777777778}
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