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Simplifying u2 + -1u + -9 = 0 Reorder the terms: -9 + -1u + u2 = 0 Solving -9 + -1u + u2 = 0 Solving for variable 'u'. Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + -1u + 9 + u2 = 0 + 9 Reorder the terms: -9 + 9 + -1u + u2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1u + u2 = 0 + 9 -1u + u2 = 0 + 9 Combine like terms: 0 + 9 = 9 -1u + u2 = 9 The u term is -1u. 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. -1u + 0.25 + u2 = 9 + 0.25 Reorder the terms: 0.25 + -1u + u2 = 9 + 0.25 Combine like terms: 9 + 0.25 = 9.25 0.25 + -1u + u2 = 9.25 Factor a perfect square on the left side: (u + -0.5)(u + -0.5) = 9.25 Calculate the square root of the right side: 3.041381265 Break this problem into two subproblems by setting (u + -0.5) equal to 3.041381265 and -3.041381265.Subproblem 1
u + -0.5 = 3.041381265 Simplifying u + -0.5 = 3.041381265 Reorder the terms: -0.5 + u = 3.041381265 Solving -0.5 + u = 3.041381265 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + u = 3.041381265 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + u = 3.041381265 + 0.5 u = 3.041381265 + 0.5 Combine like terms: 3.041381265 + 0.5 = 3.541381265 u = 3.541381265 Simplifying u = 3.541381265Subproblem 2
u + -0.5 = -3.041381265 Simplifying u + -0.5 = -3.041381265 Reorder the terms: -0.5 + u = -3.041381265 Solving -0.5 + u = -3.041381265 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + u = -3.041381265 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + u = -3.041381265 + 0.5 u = -3.041381265 + 0.5 Combine like terms: -3.041381265 + 0.5 = -2.541381265 u = -2.541381265 Simplifying u = -2.541381265Solution
The solution to the problem is based on the solutions from the subproblems. u = {3.541381265, -2.541381265}
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