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Simplifying 10y(8y + 4) = 180 Reorder the terms: 10y(4 + 8y) = 180 (4 * 10y + 8y * 10y) = 180 (40y + 80y2) = 180 Solving 40y + 80y2 = 180 Solving for variable 'y'. Reorder the terms: -180 + 40y + 80y2 = 180 + -180 Combine like terms: 180 + -180 = 0 -180 + 40y + 80y2 = 0 Factor out the Greatest Common Factor (GCF), '20'. 20(-9 + 2y + 4y2) = 0 Ignore the factor 20.Subproblem 1
Set the factor '(-9 + 2y + 4y2)' equal to zero and attempt to solve: Simplifying -9 + 2y + 4y2 = 0 Solving -9 + 2y + 4y2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -2.25 + 0.5y + y2 = 0 Move the constant term to the right: Add '2.25' to each side of the equation. -2.25 + 0.5y + 2.25 + y2 = 0 + 2.25 Reorder the terms: -2.25 + 2.25 + 0.5y + y2 = 0 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + 0.5y + y2 = 0 + 2.25 0.5y + y2 = 0 + 2.25 Combine like terms: 0 + 2.25 = 2.25 0.5y + y2 = 2.25 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 = 2.25 + 0.0625 Reorder the terms: 0.0625 + 0.5y + y2 = 2.25 + 0.0625 Combine like terms: 2.25 + 0.0625 = 2.3125 0.0625 + 0.5y + y2 = 2.3125 Factor a perfect square on the left side: (y + 0.25)(y + 0.25) = 2.3125 Calculate the square root of the right side: 1.520690633 Break this problem into two subproblems by setting (y + 0.25) equal to 1.520690633 and -1.520690633.Subproblem 1
y + 0.25 = 1.520690633 Simplifying y + 0.25 = 1.520690633 Reorder the terms: 0.25 + y = 1.520690633 Solving 0.25 + y = 1.520690633 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 = 1.520690633 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + y = 1.520690633 + -0.25 y = 1.520690633 + -0.25 Combine like terms: 1.520690633 + -0.25 = 1.270690633 y = 1.270690633 Simplifying y = 1.270690633Subproblem 2
y + 0.25 = -1.520690633 Simplifying y + 0.25 = -1.520690633 Reorder the terms: 0.25 + y = -1.520690633 Solving 0.25 + y = -1.520690633 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 = -1.520690633 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + y = -1.520690633 + -0.25 y = -1.520690633 + -0.25 Combine like terms: -1.520690633 + -0.25 = -1.770690633 y = -1.770690633 Simplifying y = -1.770690633Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.270690633, -1.770690633}Solution
y = {1.270690633, -1.770690633}
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