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Simplifying 2y2 + 9y = 10 Reorder the terms: 9y + 2y2 = 10 Solving 9y + 2y2 = 10 Solving for variable 'y'. Reorder the terms: -10 + 9y + 2y2 = 10 + -10 Combine like terms: 10 + -10 = 0 -10 + 9y + 2y2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -5 + 4.5y + y2 = 0 Move the constant term to the right: Add '5' to each side of the equation. -5 + 4.5y + 5 + y2 = 0 + 5 Reorder the terms: -5 + 5 + 4.5y + y2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 4.5y + y2 = 0 + 5 4.5y + y2 = 0 + 5 Combine like terms: 0 + 5 = 5 4.5y + y2 = 5 The y term is 4.5y. Take half its coefficient (2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. 4.5y + 5.0625 + y2 = 5 + 5.0625 Reorder the terms: 5.0625 + 4.5y + y2 = 5 + 5.0625 Combine like terms: 5 + 5.0625 = 10.0625 5.0625 + 4.5y + y2 = 10.0625 Factor a perfect square on the left side: (y + 2.25)(y + 2.25) = 10.0625 Calculate the square root of the right side: 3.172144385 Break this problem into two subproblems by setting (y + 2.25) equal to 3.172144385 and -3.172144385.Subproblem 1
y + 2.25 = 3.172144385 Simplifying y + 2.25 = 3.172144385 Reorder the terms: 2.25 + y = 3.172144385 Solving 2.25 + y = 3.172144385 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + y = 3.172144385 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + y = 3.172144385 + -2.25 y = 3.172144385 + -2.25 Combine like terms: 3.172144385 + -2.25 = 0.922144385 y = 0.922144385 Simplifying y = 0.922144385Subproblem 2
y + 2.25 = -3.172144385 Simplifying y + 2.25 = -3.172144385 Reorder the terms: 2.25 + y = -3.172144385 Solving 2.25 + y = -3.172144385 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + y = -3.172144385 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + y = -3.172144385 + -2.25 y = -3.172144385 + -2.25 Combine like terms: -3.172144385 + -2.25 = -5.422144385 y = -5.422144385 Simplifying y = -5.422144385Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.922144385, -5.422144385}
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