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Simplifying 2y2 + -1y + -5 = 0 Reorder the terms: -5 + -1y + 2y2 = 0 Solving -5 + -1y + 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'. -2.5 + -0.5y + y2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + -0.5y + 2.5 + y2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + -0.5y + y2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + -0.5y + y2 = 0 + 2.5 -0.5y + y2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 -0.5y + y2 = 2.5 The y term is -0.5y. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5y + 0.0625 + y2 = 2.5 + 0.0625 Reorder the terms: 0.0625 + -0.5y + y2 = 2.5 + 0.0625 Combine like terms: 2.5 + 0.0625 = 2.5625 0.0625 + -0.5y + y2 = 2.5625 Factor a perfect square on the left side: (y + -0.25)(y + -0.25) = 2.5625 Calculate the square root of the right side: 1.600781059 Break this problem into two subproblems by setting (y + -0.25) equal to 1.600781059 and -1.600781059.Subproblem 1
y + -0.25 = 1.600781059 Simplifying y + -0.25 = 1.600781059 Reorder the terms: -0.25 + y = 1.600781059 Solving -0.25 + y = 1.600781059 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + y = 1.600781059 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = 1.600781059 + 0.25 y = 1.600781059 + 0.25 Combine like terms: 1.600781059 + 0.25 = 1.850781059 y = 1.850781059 Simplifying y = 1.850781059Subproblem 2
y + -0.25 = -1.600781059 Simplifying y + -0.25 = -1.600781059 Reorder the terms: -0.25 + y = -1.600781059 Solving -0.25 + y = -1.600781059 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + y = -1.600781059 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = -1.600781059 + 0.25 y = -1.600781059 + 0.25 Combine like terms: -1.600781059 + 0.25 = -1.350781059 y = -1.350781059 Simplifying y = -1.350781059Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.850781059, -1.350781059}
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