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Simplifying (1 + -1y)(4y + 7) = 0 Reorder the terms: (1 + -1y)(7 + 4y) = 0 Multiply (1 + -1y) * (7 + 4y) (1(7 + 4y) + -1y * (7 + 4y)) = 0 ((7 * 1 + 4y * 1) + -1y * (7 + 4y)) = 0 ((7 + 4y) + -1y * (7 + 4y)) = 0 (7 + 4y + (7 * -1y + 4y * -1y)) = 0 (7 + 4y + (-7y + -4y2)) = 0 Combine like terms: 4y + -7y = -3y (7 + -3y + -4y2) = 0 Solving 7 + -3y + -4y2 = 0 Solving for variable 'y'. Factor a trinomial. (1 + -1y)(7 + 4y) = 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 '(7 + 4y)' equal to zero and attempt to solve: Simplifying 7 + 4y = 0 Solving 7 + 4y = 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 + 4y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 4y = 0 + -7 4y = 0 + -7 Combine like terms: 0 + -7 = -7 4y = -7 Divide each side by '4'. y = -1.75 Simplifying y = -1.75Solution
y = {1, -1.75}
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