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Simplifying 2y2 + -9y + -3 = 0 Reorder the terms: -3 + -9y + 2y2 = 0 Solving -3 + -9y + 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'. -1.5 + -4.5y + y2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + -4.5y + 1.5 + y2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + -4.5y + y2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + -4.5y + y2 = 0 + 1.5 -4.5y + y2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 -4.5y + y2 = 1.5 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 = 1.5 + 5.0625 Reorder the terms: 5.0625 + -4.5y + y2 = 1.5 + 5.0625 Combine like terms: 1.5 + 5.0625 = 6.5625 5.0625 + -4.5y + y2 = 6.5625 Factor a perfect square on the left side: (y + -2.25)(y + -2.25) = 6.5625 Calculate the square root of the right side: 2.561737691 Break this problem into two subproblems by setting (y + -2.25) equal to 2.561737691 and -2.561737691.Subproblem 1
y + -2.25 = 2.561737691 Simplifying y + -2.25 = 2.561737691 Reorder the terms: -2.25 + y = 2.561737691 Solving -2.25 + y = 2.561737691 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 = 2.561737691 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + y = 2.561737691 + 2.25 y = 2.561737691 + 2.25 Combine like terms: 2.561737691 + 2.25 = 4.811737691 y = 4.811737691 Simplifying y = 4.811737691Subproblem 2
y + -2.25 = -2.561737691 Simplifying y + -2.25 = -2.561737691 Reorder the terms: -2.25 + y = -2.561737691 Solving -2.25 + y = -2.561737691 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 = -2.561737691 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + y = -2.561737691 + 2.25 y = -2.561737691 + 2.25 Combine like terms: -2.561737691 + 2.25 = -0.311737691 y = -0.311737691 Simplifying y = -0.311737691Solution
The solution to the problem is based on the solutions from the subproblems. y = {4.811737691, -0.311737691}
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