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Simplifying -5(y + -9)(-1y + -7) = 0 Reorder the terms: -5(-9 + y)(-1y + -7) = 0 Reorder the terms: -5(-9 + y)(-7 + -1y) = 0 Multiply (-9 + y) * (-7 + -1y) -5(-9(-7 + -1y) + y(-7 + -1y)) = 0 -5((-7 * -9 + -1y * -9) + y(-7 + -1y)) = 0 -5((63 + 9y) + y(-7 + -1y)) = 0 -5(63 + 9y + (-7 * y + -1y * y)) = 0 -5(63 + 9y + (-7y + -1y2)) = 0 Combine like terms: 9y + -7y = 2y -5(63 + 2y + -1y2) = 0 (63 * -5 + 2y * -5 + -1y2 * -5) = 0 (-315 + -10y + 5y2) = 0 Solving -315 + -10y + 5y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '5'. 5(-63 + -2y + y2) = 0 Factor a trinomial. 5((-7 + -1y)(9 + -1y)) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-7 + -1y)' equal to zero and attempt to solve: Simplifying -7 + -1y = 0 Solving -7 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1y = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1y = 0 + 7 -1y = 0 + 7 Combine like terms: 0 + 7 = 7 -1y = 7 Divide each side by '-1'. y = -7 Simplifying y = -7Subproblem 2
Set the factor '(9 + -1y)' equal to zero and attempt to solve: Simplifying 9 + -1y = 0 Solving 9 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1y = 0 + -9 -1y = 0 + -9 Combine like terms: 0 + -9 = -9 -1y = -9 Divide each side by '-1'. y = 9 Simplifying y = 9Solution
y = {-7, 9}
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