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Simplifying -4y(y + 8) + -5 = 51 Reorder the terms: -4y(8 + y) + -5 = 51 (8 * -4y + y * -4y) + -5 = 51 (-32y + -4y2) + -5 = 51 Reorder the terms: -5 + -32y + -4y2 = 51 Solving -5 + -32y + -4y2 = 51 Solving for variable 'y'. Reorder the terms: -5 + -51 + -32y + -4y2 = 51 + -51 Combine like terms: -5 + -51 = -56 -56 + -32y + -4y2 = 51 + -51 Combine like terms: 51 + -51 = 0 -56 + -32y + -4y2 = 0 Factor out the Greatest Common Factor (GCF), '-4'. -4(14 + 8y + y2) = 0 Ignore the factor -4.Subproblem 1
Set the factor '(14 + 8y + y2)' equal to zero and attempt to solve: Simplifying 14 + 8y + y2 = 0 Solving 14 + 8y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-14' to each side of the equation. 14 + 8y + -14 + y2 = 0 + -14 Reorder the terms: 14 + -14 + 8y + y2 = 0 + -14 Combine like terms: 14 + -14 = 0 0 + 8y + y2 = 0 + -14 8y + y2 = 0 + -14 Combine like terms: 0 + -14 = -14 8y + y2 = -14 The y term is 8y. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8y + 16 + y2 = -14 + 16 Reorder the terms: 16 + 8y + y2 = -14 + 16 Combine like terms: -14 + 16 = 2 16 + 8y + y2 = 2 Factor a perfect square on the left side: (y + 4)(y + 4) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (y + 4) equal to 1.414213562 and -1.414213562.Subproblem 1
y + 4 = 1.414213562 Simplifying y + 4 = 1.414213562 Reorder the terms: 4 + y = 1.414213562 Solving 4 + y = 1.414213562 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = 1.414213562 + -4 Combine like terms: 4 + -4 = 0 0 + y = 1.414213562 + -4 y = 1.414213562 + -4 Combine like terms: 1.414213562 + -4 = -2.585786438 y = -2.585786438 Simplifying y = -2.585786438Subproblem 2
y + 4 = -1.414213562 Simplifying y + 4 = -1.414213562 Reorder the terms: 4 + y = -1.414213562 Solving 4 + y = -1.414213562 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = -1.414213562 + -4 Combine like terms: 4 + -4 = 0 0 + y = -1.414213562 + -4 y = -1.414213562 + -4 Combine like terms: -1.414213562 + -4 = -5.414213562 y = -5.414213562 Simplifying y = -5.414213562Solution
The solution to the problem is based on the solutions from the subproblems. y = {-2.585786438, -5.414213562}Solution
y = {-2.585786438, -5.414213562}
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