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Simplifying 2y2 + 5y + -14 = 0 Reorder the terms: -14 + 5y + 2y2 = 0 Solving -14 + 5y + 2y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -7 + 2.5y + y2 = 0 Move the constant term to the right: Add '7' to each side of the equation. -7 + 2.5y + 7 + y2 = 0 + 7 Reorder the terms: -7 + 7 + 2.5y + y2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 2.5y + y2 = 0 + 7 2.5y + y2 = 0 + 7 Combine like terms: 0 + 7 = 7 2.5y + y2 = 7 The y term is 2.5y. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5y + 1.5625 + y2 = 7 + 1.5625 Reorder the terms: 1.5625 + 2.5y + y2 = 7 + 1.5625 Combine like terms: 7 + 1.5625 = 8.5625 1.5625 + 2.5y + y2 = 8.5625 Factor a perfect square on the left side: (y + 1.25)(y + 1.25) = 8.5625 Calculate the square root of the right side: 2.926174978 Break this problem into two subproblems by setting (y + 1.25) equal to 2.926174978 and -2.926174978.Subproblem 1
y + 1.25 = 2.926174978 Simplifying y + 1.25 = 2.926174978 Reorder the terms: 1.25 + y = 2.926174978 Solving 1.25 + y = 2.926174978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + y = 2.926174978 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + y = 2.926174978 + -1.25 y = 2.926174978 + -1.25 Combine like terms: 2.926174978 + -1.25 = 1.676174978 y = 1.676174978 Simplifying y = 1.676174978Subproblem 2
y + 1.25 = -2.926174978 Simplifying y + 1.25 = -2.926174978 Reorder the terms: 1.25 + y = -2.926174978 Solving 1.25 + y = -2.926174978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + y = -2.926174978 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + y = -2.926174978 + -1.25 y = -2.926174978 + -1.25 Combine like terms: -2.926174978 + -1.25 = -4.176174978 y = -4.176174978 Simplifying y = -4.176174978Solution
The solution to the problem is based on the solutions from the subproblems. y = {1.676174978, -4.176174978}
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