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Simplifying (y + -5)(y + -2) = 25 Reorder the terms: (-5 + y)(y + -2) = 25 Reorder the terms: (-5 + y)(-2 + y) = 25 Multiply (-5 + y) * (-2 + y) (-5(-2 + y) + y(-2 + y)) = 25 ((-2 * -5 + y * -5) + y(-2 + y)) = 25 ((10 + -5y) + y(-2 + y)) = 25 (10 + -5y + (-2 * y + y * y)) = 25 (10 + -5y + (-2y + y2)) = 25 Combine like terms: -5y + -2y = -7y (10 + -7y + y2) = 25 Solving 10 + -7y + y2 = 25 Solving for variable 'y'. Reorder the terms: 10 + -25 + -7y + y2 = 25 + -25 Combine like terms: 10 + -25 = -15 -15 + -7y + y2 = 25 + -25 Combine like terms: 25 + -25 = 0 -15 + -7y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '15' to each side of the equation. -15 + -7y + 15 + y2 = 0 + 15 Reorder the terms: -15 + 15 + -7y + y2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -7y + y2 = 0 + 15 -7y + y2 = 0 + 15 Combine like terms: 0 + 15 = 15 -7y + y2 = 15 The y term is -7y. Take half its coefficient (-3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. -7y + 12.25 + y2 = 15 + 12.25 Reorder the terms: 12.25 + -7y + y2 = 15 + 12.25 Combine like terms: 15 + 12.25 = 27.25 12.25 + -7y + y2 = 27.25 Factor a perfect square on the left side: (y + -3.5)(y + -3.5) = 27.25 Calculate the square root of the right side: 5.220153254 Break this problem into two subproblems by setting (y + -3.5) equal to 5.220153254 and -5.220153254.Subproblem 1
y + -3.5 = 5.220153254 Simplifying y + -3.5 = 5.220153254 Reorder the terms: -3.5 + y = 5.220153254 Solving -3.5 + y = 5.220153254 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = 5.220153254 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = 5.220153254 + 3.5 y = 5.220153254 + 3.5 Combine like terms: 5.220153254 + 3.5 = 8.720153254 y = 8.720153254 Simplifying y = 8.720153254Subproblem 2
y + -3.5 = -5.220153254 Simplifying y + -3.5 = -5.220153254 Reorder the terms: -3.5 + y = -5.220153254 Solving -3.5 + y = -5.220153254 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = -5.220153254 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = -5.220153254 + 3.5 y = -5.220153254 + 3.5 Combine like terms: -5.220153254 + 3.5 = -1.720153254 y = -1.720153254 Simplifying y = -1.720153254Solution
The solution to the problem is based on the solutions from the subproblems. y = {8.720153254, -1.720153254}
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