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Simplifying 16y2 + -56y + -49 = 0 Reorder the terms: -49 + -56y + 16y2 = 0 Solving -49 + -56y + 16y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. -3.0625 + -3.5y + y2 = 0 Move the constant term to the right: Add '3.0625' to each side of the equation. -3.0625 + -3.5y + 3.0625 + y2 = 0 + 3.0625 Reorder the terms: -3.0625 + 3.0625 + -3.5y + y2 = 0 + 3.0625 Combine like terms: -3.0625 + 3.0625 = 0.0000 0.0000 + -3.5y + y2 = 0 + 3.0625 -3.5y + y2 = 0 + 3.0625 Combine like terms: 0 + 3.0625 = 3.0625 -3.5y + y2 = 3.0625 The y term is -3.5y. Take half its coefficient (-1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. -3.5y + 3.0625 + y2 = 3.0625 + 3.0625 Reorder the terms: 3.0625 + -3.5y + y2 = 3.0625 + 3.0625 Combine like terms: 3.0625 + 3.0625 = 6.125 3.0625 + -3.5y + y2 = 6.125 Factor a perfect square on the left side: (y + -1.75)(y + -1.75) = 6.125 Calculate the square root of the right side: 2.474873734 Break this problem into two subproblems by setting (y + -1.75) equal to 2.474873734 and -2.474873734.Subproblem 1
y + -1.75 = 2.474873734 Simplifying y + -1.75 = 2.474873734 Reorder the terms: -1.75 + y = 2.474873734 Solving -1.75 + y = 2.474873734 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + y = 2.474873734 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + y = 2.474873734 + 1.75 y = 2.474873734 + 1.75 Combine like terms: 2.474873734 + 1.75 = 4.224873734 y = 4.224873734 Simplifying y = 4.224873734Subproblem 2
y + -1.75 = -2.474873734 Simplifying y + -1.75 = -2.474873734 Reorder the terms: -1.75 + y = -2.474873734 Solving -1.75 + y = -2.474873734 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + y = -2.474873734 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + y = -2.474873734 + 1.75 y = -2.474873734 + 1.75 Combine like terms: -2.474873734 + 1.75 = -0.724873734 y = -0.724873734 Simplifying y = -0.724873734Solution
The solution to the problem is based on the solutions from the subproblems. y = {4.224873734, -0.724873734}
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