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Simplifying 2y2 + 7y + -5 = 5y Reorder the terms: -5 + 7y + 2y2 = 5y Solving -5 + 7y + 2y2 = 5y Solving for variable 'y'. Reorder the terms: -5 + 7y + -5y + 2y2 = 5y + -5y Combine like terms: 7y + -5y = 2y -5 + 2y + 2y2 = 5y + -5y Combine like terms: 5y + -5y = 0 -5 + 2y + 2y2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -2.5 + y + y2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + y + 2.5 + y2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + y + y2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + y + y2 = 0 + 2.5 y + y2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 y + y2 = 2.5 The y term is y. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + y2 = 2.5 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + y2 = 2.5 + 0.25 Combine like terms: 2.5 + 0.25 = 2.75 1.25 + y2 = 2.75 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = 2.75 Calculate the square root of the right side: 1.658312395 Break this problem into two subproblems by setting (y + 0.5) equal to 1.658312395 and -1.658312395.Subproblem 1
y + 0.5 = 1.658312395 Simplifying y + 0.5 = 1.658312395 Reorder the terms: 0.5 + y = 1.658312395 Solving 0.5 + y = 1.658312395 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 1.658312395 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 1.658312395 + -0.5 y = 1.658312395 + -0.5 Combine like terms: 1.658312395 + -0.5 = 1.158312395 y = 1.158312395 Simplifying y = 1.158312395Subproblem 2
y + 0.5 = -1.658312395 Simplifying y + 0.5 = -1.658312395 Reorder the terms: 0.5 + y = -1.658312395 Solving 0.5 + y = -1.658312395 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -1.658312395 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -1.658312395 + -0.5 y = -1.658312395 + -0.5 Combine like terms: -1.658312395 + -0.5 = -2.158312395 y = -2.158312395 Simplifying y = -2.158312395Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.158312395, -2.158312395}
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