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Simplifying 2y2 + -5y = 11 Reorder the terms: -5y + 2y2 = 11 Solving -5y + 2y2 = 11 Solving for variable 'y'. Reorder the terms: -11 + -5y + 2y2 = 11 + -11 Combine like terms: 11 + -11 = 0 -11 + -5y + 2y2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -5.5 + -2.5y + y2 = 0 Move the constant term to the right: Add '5.5' to each side of the equation. -5.5 + -2.5y + 5.5 + y2 = 0 + 5.5 Reorder the terms: -5.5 + 5.5 + -2.5y + y2 = 0 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + -2.5y + y2 = 0 + 5.5 -2.5y + y2 = 0 + 5.5 Combine like terms: 0 + 5.5 = 5.5 -2.5y + y2 = 5.5 The y term is -2.5y. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5y + 1.5625 + y2 = 5.5 + 1.5625 Reorder the terms: 1.5625 + -2.5y + y2 = 5.5 + 1.5625 Combine like terms: 5.5 + 1.5625 = 7.0625 1.5625 + -2.5y + y2 = 7.0625 Factor a perfect square on the left side: (y + -1.25)(y + -1.25) = 7.0625 Calculate the square root of the right side: 2.657536453 Break this problem into two subproblems by setting (y + -1.25) equal to 2.657536453 and -2.657536453.Subproblem 1
y + -1.25 = 2.657536453 Simplifying y + -1.25 = 2.657536453 Reorder the terms: -1.25 + y = 2.657536453 Solving -1.25 + y = 2.657536453 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = 2.657536453 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = 2.657536453 + 1.25 y = 2.657536453 + 1.25 Combine like terms: 2.657536453 + 1.25 = 3.907536453 y = 3.907536453 Simplifying y = 3.907536453Subproblem 2
y + -1.25 = -2.657536453 Simplifying y + -1.25 = -2.657536453 Reorder the terms: -1.25 + y = -2.657536453 Solving -1.25 + y = -2.657536453 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = -2.657536453 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = -2.657536453 + 1.25 y = -2.657536453 + 1.25 Combine like terms: -2.657536453 + 1.25 = -1.407536453 y = -1.407536453 Simplifying y = -1.407536453Solution
The solution to the problem is based on the solutions from the subproblems. y = {3.907536453, -1.407536453}
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