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Simplifying (2y + 9)(1 + -1y) = 0 Reorder the terms: (9 + 2y)(1 + -1y) = 0 Multiply (9 + 2y) * (1 + -1y) (9(1 + -1y) + 2y * (1 + -1y)) = 0 ((1 * 9 + -1y * 9) + 2y * (1 + -1y)) = 0 ((9 + -9y) + 2y * (1 + -1y)) = 0 (9 + -9y + (1 * 2y + -1y * 2y)) = 0 (9 + -9y + (2y + -2y2)) = 0 Combine like terms: -9y + 2y = -7y (9 + -7y + -2y2) = 0 Solving 9 + -7y + -2y2 = 0 Solving for variable 'y'. Factor a trinomial. (1 + -1y)(9 + 2y) = 0Subproblem 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 '(9 + 2y)' equal to zero and attempt to solve: Simplifying 9 + 2y = 0 Solving 9 + 2y = 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 + 2y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2y = 0 + -9 2y = 0 + -9 Combine like terms: 0 + -9 = -9 2y = -9 Divide each side by '2'. y = -4.5 Simplifying y = -4.5Solution
y = {1, -4.5}
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