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Simplifying 4y2 + -8 = y Reorder the terms: -8 + 4y2 = y Solving -8 + 4y2 = y Solving for variable 'y'. Reorder the terms: -8 + -1y + 4y2 = y + -1y Combine like terms: y + -1y = 0 -8 + -1y + 4y2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -2 + -0.25y + y2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + -0.25y + 2 + y2 = 0 + 2 Reorder the terms: -2 + 2 + -0.25y + y2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -0.25y + y2 = 0 + 2 -0.25y + y2 = 0 + 2 Combine like terms: 0 + 2 = 2 -0.25y + y2 = 2 The y term is -0.25y. Take half its coefficient (-0.125). Square it (0.015625) and add it to both sides. Add '0.015625' to each side of the equation. -0.25y + 0.015625 + y2 = 2 + 0.015625 Reorder the terms: 0.015625 + -0.25y + y2 = 2 + 0.015625 Combine like terms: 2 + 0.015625 = 2.015625 0.015625 + -0.25y + y2 = 2.015625 Factor a perfect square on the left side: (y + -0.125)(y + -0.125) = 2.015625 Calculate the square root of the right side: 1.419727086 Break this problem into two subproblems by setting (y + -0.125) equal to 1.419727086 and -1.419727086.Subproblem 1
y + -0.125 = 1.419727086 Simplifying y + -0.125 = 1.419727086 Reorder the terms: -0.125 + y = 1.419727086 Solving -0.125 + y = 1.419727086 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + y = 1.419727086 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + y = 1.419727086 + 0.125 y = 1.419727086 + 0.125 Combine like terms: 1.419727086 + 0.125 = 1.544727086 y = 1.544727086 Simplifying y = 1.544727086Subproblem 2
y + -0.125 = -1.419727086 Simplifying y + -0.125 = -1.419727086 Reorder the terms: -0.125 + y = -1.419727086 Solving -0.125 + y = -1.419727086 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + y = -1.419727086 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + y = -1.419727086 + 0.125 y = -1.419727086 + 0.125 Combine like terms: -1.419727086 + 0.125 = -1.294727086 y = -1.294727086 Simplifying y = -1.294727086Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.544727086, -1.294727086}
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