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Simplifying (5y + 7)(9 + -1y) = 0 Reorder the terms: (7 + 5y)(9 + -1y) = 0 Multiply (7 + 5y) * (9 + -1y) (7(9 + -1y) + 5y * (9 + -1y)) = 0 ((9 * 7 + -1y * 7) + 5y * (9 + -1y)) = 0 ((63 + -7y) + 5y * (9 + -1y)) = 0 (63 + -7y + (9 * 5y + -1y * 5y)) = 0 (63 + -7y + (45y + -5y2)) = 0 Combine like terms: -7y + 45y = 38y (63 + 38y + -5y2) = 0 Solving 63 + 38y + -5y2 = 0 Solving for variable 'y'. Factor a trinomial. (9 + -1y)(7 + 5y) = 0Subproblem 1
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 = 9Subproblem 2
Set the factor '(7 + 5y)' equal to zero and attempt to solve: Simplifying 7 + 5y = 0 Solving 7 + 5y = 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 + 5y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 5y = 0 + -7 5y = 0 + -7 Combine like terms: 0 + -7 = -7 5y = -7 Divide each side by '5'. y = -1.4 Simplifying y = -1.4Solution
y = {9, -1.4}
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