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Simplifying (3y + -9)(y + 1) = 0 Reorder the terms: (-9 + 3y)(y + 1) = 0 Reorder the terms: (-9 + 3y)(1 + y) = 0 Multiply (-9 + 3y) * (1 + y) (-9(1 + y) + 3y * (1 + y)) = 0 ((1 * -9 + y * -9) + 3y * (1 + y)) = 0 ((-9 + -9y) + 3y * (1 + y)) = 0 (-9 + -9y + (1 * 3y + y * 3y)) = 0 (-9 + -9y + (3y + 3y2)) = 0 Combine like terms: -9y + 3y = -6y (-9 + -6y + 3y2) = 0 Solving -9 + -6y + 3y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '3'. 3(-3 + -2y + y2) = 0 Factor a trinomial. 3((-1 + -1y)(3 + -1y)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-1 + -1y)' equal to zero and attempt to solve: Simplifying -1 + -1y = 0 Solving -1 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1y = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1y = 0 + 1 -1y = 0 + 1 Combine like terms: 0 + 1 = 1 -1y = 1 Divide each side by '-1'. y = -1 Simplifying y = -1Subproblem 2
Set the factor '(3 + -1y)' equal to zero and attempt to solve: Simplifying 3 + -1y = 0 Solving 3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1y = 0 + -3 -1y = 0 + -3 Combine like terms: 0 + -3 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3Solution
y = {-1, 3}
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