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Simplifying 4y2 + -2y + -5 = 0 Reorder the terms: -5 + -2y + 4y2 = 0 Solving -5 + -2y + 4y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.25 + -0.5y + y2 = 0 Move the constant term to the right: Add '1.25' to each side of the equation. -1.25 + -0.5y + 1.25 + y2 = 0 + 1.25 Reorder the terms: -1.25 + 1.25 + -0.5y + y2 = 0 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + -0.5y + y2 = 0 + 1.25 -0.5y + y2 = 0 + 1.25 Combine like terms: 0 + 1.25 = 1.25 -0.5y + y2 = 1.25 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 = 1.25 + 0.0625 Reorder the terms: 0.0625 + -0.5y + y2 = 1.25 + 0.0625 Combine like terms: 1.25 + 0.0625 = 1.3125 0.0625 + -0.5y + y2 = 1.3125 Factor a perfect square on the left side: (y + -0.25)(y + -0.25) = 1.3125 Calculate the square root of the right side: 1.145643924 Break this problem into two subproblems by setting (y + -0.25) equal to 1.145643924 and -1.145643924.Subproblem 1
y + -0.25 = 1.145643924 Simplifying y + -0.25 = 1.145643924 Reorder the terms: -0.25 + y = 1.145643924 Solving -0.25 + y = 1.145643924 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 = 1.145643924 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = 1.145643924 + 0.25 y = 1.145643924 + 0.25 Combine like terms: 1.145643924 + 0.25 = 1.395643924 y = 1.395643924 Simplifying y = 1.395643924Subproblem 2
y + -0.25 = -1.145643924 Simplifying y + -0.25 = -1.145643924 Reorder the terms: -0.25 + y = -1.145643924 Solving -0.25 + y = -1.145643924 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 = -1.145643924 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = -1.145643924 + 0.25 y = -1.145643924 + 0.25 Combine like terms: -1.145643924 + 0.25 = -0.895643924 y = -0.895643924 Simplifying y = -0.895643924Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.395643924, -0.895643924}
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