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Simplifying -5u2 + -19u + 18 = 0 Reorder the terms: 18 + -19u + -5u2 = 0 Solving 18 + -19u + -5u2 = 0 Solving for variable 'u'. Begin completing the square. Divide all terms by -5 the coefficient of the squared term: Divide each side by '-5'. -3.6 + 3.8u + u2 = 0 Move the constant term to the right: Add '3.6' to each side of the equation. -3.6 + 3.8u + 3.6 + u2 = 0 + 3.6 Reorder the terms: -3.6 + 3.6 + 3.8u + u2 = 0 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + 3.8u + u2 = 0 + 3.6 3.8u + u2 = 0 + 3.6 Combine like terms: 0 + 3.6 = 3.6 3.8u + u2 = 3.6 The u term is 3.8u. Take half its coefficient (1.9). Square it (3.61) and add it to both sides. Add '3.61' to each side of the equation. 3.8u + 3.61 + u2 = 3.6 + 3.61 Reorder the terms: 3.61 + 3.8u + u2 = 3.6 + 3.61 Combine like terms: 3.6 + 3.61 = 7.21 3.61 + 3.8u + u2 = 7.21 Factor a perfect square on the left side: (u + 1.9)(u + 1.9) = 7.21 Calculate the square root of the right side: 2.685144316 Break this problem into two subproblems by setting (u + 1.9) equal to 2.685144316 and -2.685144316.Subproblem 1
u + 1.9 = 2.685144316 Simplifying u + 1.9 = 2.685144316 Reorder the terms: 1.9 + u = 2.685144316 Solving 1.9 + u = 2.685144316 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + u = 2.685144316 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + u = 2.685144316 + -1.9 u = 2.685144316 + -1.9 Combine like terms: 2.685144316 + -1.9 = 0.785144316 u = 0.785144316 Simplifying u = 0.785144316Subproblem 2
u + 1.9 = -2.685144316 Simplifying u + 1.9 = -2.685144316 Reorder the terms: 1.9 + u = -2.685144316 Solving 1.9 + u = -2.685144316 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + u = -2.685144316 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + u = -2.685144316 + -1.9 u = -2.685144316 + -1.9 Combine like terms: -2.685144316 + -1.9 = -4.585144316 u = -4.585144316 Simplifying u = -4.585144316Solution
The solution to the problem is based on the solutions from the subproblems. u = {0.785144316, -4.585144316}
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