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Simplifying y2 + 25 = 2y2 + 9y + 5 Reorder the terms: 25 + y2 = 2y2 + 9y + 5 Reorder the terms: 25 + y2 = 5 + 9y + 2y2 Solving 25 + y2 = 5 + 9y + 2y2 Solving for variable 'y'. Reorder the terms: 25 + -5 + -9y + y2 + -2y2 = 5 + 9y + 2y2 + -5 + -9y + -2y2 Combine like terms: 25 + -5 = 20 20 + -9y + y2 + -2y2 = 5 + 9y + 2y2 + -5 + -9y + -2y2 Combine like terms: y2 + -2y2 = -1y2 20 + -9y + -1y2 = 5 + 9y + 2y2 + -5 + -9y + -2y2 Reorder the terms: 20 + -9y + -1y2 = 5 + -5 + 9y + -9y + 2y2 + -2y2 Combine like terms: 5 + -5 = 0 20 + -9y + -1y2 = 0 + 9y + -9y + 2y2 + -2y2 20 + -9y + -1y2 = 9y + -9y + 2y2 + -2y2 Combine like terms: 9y + -9y = 0 20 + -9y + -1y2 = 0 + 2y2 + -2y2 20 + -9y + -1y2 = 2y2 + -2y2 Combine like terms: 2y2 + -2y2 = 0 20 + -9y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -20 + 9y + y2 = 0 Move the constant term to the right: Add '20' to each side of the equation. -20 + 9y + 20 + y2 = 0 + 20 Reorder the terms: -20 + 20 + 9y + y2 = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 9y + y2 = 0 + 20 9y + y2 = 0 + 20 Combine like terms: 0 + 20 = 20 9y + y2 = 20 The y term is 9y. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9y + 20.25 + y2 = 20 + 20.25 Reorder the terms: 20.25 + 9y + y2 = 20 + 20.25 Combine like terms: 20 + 20.25 = 40.25 20.25 + 9y + y2 = 40.25 Factor a perfect square on the left side: (y + 4.5)(y + 4.5) = 40.25 Calculate the square root of the right side: 6.34428877 Break this problem into two subproblems by setting (y + 4.5) equal to 6.34428877 and -6.34428877.Subproblem 1
y + 4.5 = 6.34428877 Simplifying y + 4.5 = 6.34428877 Reorder the terms: 4.5 + y = 6.34428877 Solving 4.5 + y = 6.34428877 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + y = 6.34428877 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + y = 6.34428877 + -4.5 y = 6.34428877 + -4.5 Combine like terms: 6.34428877 + -4.5 = 1.84428877 y = 1.84428877 Simplifying y = 1.84428877Subproblem 2
y + 4.5 = -6.34428877 Simplifying y + 4.5 = -6.34428877 Reorder the terms: 4.5 + y = -6.34428877 Solving 4.5 + y = -6.34428877 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + y = -6.34428877 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + y = -6.34428877 + -4.5 y = -6.34428877 + -4.5 Combine like terms: -6.34428877 + -4.5 = -10.84428877 y = -10.84428877 Simplifying y = -10.84428877Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.84428877, -10.84428877}
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