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Simplifying -8u2 + -3u + 6 = 0 Reorder the terms: 6 + -3u + -8u2 = 0 Solving 6 + -3u + -8u2 = 0 Solving for variable 'u'. Begin completing the square. Divide all terms by -8 the coefficient of the squared term: Divide each side by '-8'. -0.75 + 0.375u + u2 = 0 Move the constant term to the right: Add '0.75' to each side of the equation. -0.75 + 0.375u + 0.75 + u2 = 0 + 0.75 Reorder the terms: -0.75 + 0.75 + 0.375u + u2 = 0 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + 0.375u + u2 = 0 + 0.75 0.375u + u2 = 0 + 0.75 Combine like terms: 0 + 0.75 = 0.75 0.375u + u2 = 0.75 The u term is 0.375u. Take half its coefficient (0.1875). Square it (0.03515625) and add it to both sides. Add '0.03515625' to each side of the equation. 0.375u + 0.03515625 + u2 = 0.75 + 0.03515625 Reorder the terms: 0.03515625 + 0.375u + u2 = 0.75 + 0.03515625 Combine like terms: 0.75 + 0.03515625 = 0.78515625 0.03515625 + 0.375u + u2 = 0.78515625 Factor a perfect square on the left side: (u + 0.1875)(u + 0.1875) = 0.78515625 Calculate the square root of the right side: 0.88609043 Break this problem into two subproblems by setting (u + 0.1875) equal to 0.88609043 and -0.88609043.Subproblem 1
u + 0.1875 = 0.88609043 Simplifying u + 0.1875 = 0.88609043 Reorder the terms: 0.1875 + u = 0.88609043 Solving 0.1875 + u = 0.88609043 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + u = 0.88609043 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + u = 0.88609043 + -0.1875 u = 0.88609043 + -0.1875 Combine like terms: 0.88609043 + -0.1875 = 0.69859043 u = 0.69859043 Simplifying u = 0.69859043Subproblem 2
u + 0.1875 = -0.88609043 Simplifying u + 0.1875 = -0.88609043 Reorder the terms: 0.1875 + u = -0.88609043 Solving 0.1875 + u = -0.88609043 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + u = -0.88609043 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + u = -0.88609043 + -0.1875 u = -0.88609043 + -0.1875 Combine like terms: -0.88609043 + -0.1875 = -1.07359043 u = -1.07359043 Simplifying u = -1.07359043Solution
The solution to the problem is based on the solutions from the subproblems. u = {0.69859043, -1.07359043}
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