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Simplifying 3(y + 5)(y + 4) = -2(3y + 5) Reorder the terms: 3(5 + y)(y + 4) = -2(3y + 5) Reorder the terms: 3(5 + y)(4 + y) = -2(3y + 5) Multiply (5 + y) * (4 + y) 3(5(4 + y) + y(4 + y)) = -2(3y + 5) 3((4 * 5 + y * 5) + y(4 + y)) = -2(3y + 5) 3((20 + 5y) + y(4 + y)) = -2(3y + 5) 3(20 + 5y + (4 * y + y * y)) = -2(3y + 5) 3(20 + 5y + (4y + y2)) = -2(3y + 5) Combine like terms: 5y + 4y = 9y 3(20 + 9y + y2) = -2(3y + 5) (20 * 3 + 9y * 3 + y2 * 3) = -2(3y + 5) (60 + 27y + 3y2) = -2(3y + 5) Reorder the terms: 60 + 27y + 3y2 = -2(5 + 3y) 60 + 27y + 3y2 = (5 * -2 + 3y * -2) 60 + 27y + 3y2 = (-10 + -6y) Solving 60 + 27y + 3y2 = -10 + -6y Solving for variable 'y'. Reorder the terms: 60 + 10 + 27y + 6y + 3y2 = -10 + -6y + 10 + 6y Combine like terms: 60 + 10 = 70 70 + 27y + 6y + 3y2 = -10 + -6y + 10 + 6y Combine like terms: 27y + 6y = 33y 70 + 33y + 3y2 = -10 + -6y + 10 + 6y Reorder the terms: 70 + 33y + 3y2 = -10 + 10 + -6y + 6y Combine like terms: -10 + 10 = 0 70 + 33y + 3y2 = 0 + -6y + 6y 70 + 33y + 3y2 = -6y + 6y Combine like terms: -6y + 6y = 0 70 + 33y + 3y2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 23.33333333 + 11y + y2 = 0 Move the constant term to the right: Add '-23.33333333' to each side of the equation. 23.33333333 + 11y + -23.33333333 + y2 = 0 + -23.33333333 Reorder the terms: 23.33333333 + -23.33333333 + 11y + y2 = 0 + -23.33333333 Combine like terms: 23.33333333 + -23.33333333 = 0.00000000 0.00000000 + 11y + y2 = 0 + -23.33333333 11y + y2 = 0 + -23.33333333 Combine like terms: 0 + -23.33333333 = -23.33333333 11y + y2 = -23.33333333 The y term is 11y. Take half its coefficient (5.5). Square it (30.25) and add it to both sides. Add '30.25' to each side of the equation. 11y + 30.25 + y2 = -23.33333333 + 30.25 Reorder the terms: 30.25 + 11y + y2 = -23.33333333 + 30.25 Combine like terms: -23.33333333 + 30.25 = 6.91666667 30.25 + 11y + y2 = 6.91666667 Factor a perfect square on the left side: (y + 5.5)(y + 5.5) = 6.91666667 Calculate the square root of the right side: 2.62995564 Break this problem into two subproblems by setting (y + 5.5) equal to 2.62995564 and -2.62995564.Subproblem 1
y + 5.5 = 2.62995564 Simplifying y + 5.5 = 2.62995564 Reorder the terms: 5.5 + y = 2.62995564 Solving 5.5 + y = 2.62995564 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = 2.62995564 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = 2.62995564 + -5.5 y = 2.62995564 + -5.5 Combine like terms: 2.62995564 + -5.5 = -2.87004436 y = -2.87004436 Simplifying y = -2.87004436Subproblem 2
y + 5.5 = -2.62995564 Simplifying y + 5.5 = -2.62995564 Reorder the terms: 5.5 + y = -2.62995564 Solving 5.5 + y = -2.62995564 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = -2.62995564 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = -2.62995564 + -5.5 y = -2.62995564 + -5.5 Combine like terms: -2.62995564 + -5.5 = -8.12995564 y = -8.12995564 Simplifying y = -8.12995564Solution
The solution to the problem is based on the solutions from the subproblems. y = {-2.87004436, -8.12995564}
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