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Simplifying 2y2 + -6y + -9 = 0 Reorder the terms: -9 + -6y + 2y2 = 0 Solving -9 + -6y + 2y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4.5 + -3y + y2 = 0 Move the constant term to the right: Add '4.5' to each side of the equation. -4.5 + -3y + 4.5 + y2 = 0 + 4.5 Reorder the terms: -4.5 + 4.5 + -3y + y2 = 0 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + -3y + y2 = 0 + 4.5 -3y + y2 = 0 + 4.5 Combine like terms: 0 + 4.5 = 4.5 -3y + y2 = 4.5 The y term is -3y. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3y + 2.25 + y2 = 4.5 + 2.25 Reorder the terms: 2.25 + -3y + y2 = 4.5 + 2.25 Combine like terms: 4.5 + 2.25 = 6.75 2.25 + -3y + y2 = 6.75 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = 6.75 Calculate the square root of the right side: 2.598076211 Break this problem into two subproblems by setting (y + -1.5) equal to 2.598076211 and -2.598076211.Subproblem 1
y + -1.5 = 2.598076211 Simplifying y + -1.5 = 2.598076211 Reorder the terms: -1.5 + y = 2.598076211 Solving -1.5 + y = 2.598076211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = 2.598076211 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = 2.598076211 + 1.5 y = 2.598076211 + 1.5 Combine like terms: 2.598076211 + 1.5 = 4.098076211 y = 4.098076211 Simplifying y = 4.098076211Subproblem 2
y + -1.5 = -2.598076211 Simplifying y + -1.5 = -2.598076211 Reorder the terms: -1.5 + y = -2.598076211 Solving -1.5 + y = -2.598076211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = -2.598076211 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = -2.598076211 + 1.5 y = -2.598076211 + 1.5 Combine like terms: -2.598076211 + 1.5 = -1.098076211 y = -1.098076211 Simplifying y = -1.098076211Solution
The solution to the problem is based on the solutions from the subproblems. y = {4.098076211, -1.098076211}
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