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Simplifying -3(y + -1)(-1y + -7) = 0 Reorder the terms: -3(-1 + y)(-1y + -7) = 0 Reorder the terms: -3(-1 + y)(-7 + -1y) = 0 Multiply (-1 + y) * (-7 + -1y) -3(-1(-7 + -1y) + y(-7 + -1y)) = 0 -3((-7 * -1 + -1y * -1) + y(-7 + -1y)) = 0 -3((7 + 1y) + y(-7 + -1y)) = 0 -3(7 + 1y + (-7 * y + -1y * y)) = 0 -3(7 + 1y + (-7y + -1y2)) = 0 Combine like terms: 1y + -7y = -6y -3(7 + -6y + -1y2) = 0 (7 * -3 + -6y * -3 + -1y2 * -3) = 0 (-21 + 18y + 3y2) = 0 Solving -21 + 18y + 3y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '3'. 3(-7 + 6y + y2) = 0 Factor a trinomial. 3((-7 + -1y)(1 + -1y)) = 0 Ignore the factor 3.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 '(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 = 1Solution
y = {-7, 1}
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