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Simplifying 6u2 + 19u + 9 = 0 Reorder the terms: 9 + 19u + 6u2 = 0 Solving 9 + 19u + 6u2 = 0 Solving for variable 'u'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. 1.5 + 3.166666667u + u2 = 0 Move the constant term to the right: Add '-1.5' to each side of the equation. 1.5 + 3.166666667u + -1.5 + u2 = 0 + -1.5 Reorder the terms: 1.5 + -1.5 + 3.166666667u + u2 = 0 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + 3.166666667u + u2 = 0 + -1.5 3.166666667u + u2 = 0 + -1.5 Combine like terms: 0 + -1.5 = -1.5 3.166666667u + u2 = -1.5 The u term is 3.166666667u. Take half its coefficient (1.583333334). Square it (2.506944447) and add it to both sides. Add '2.506944447' to each side of the equation. 3.166666667u + 2.506944447 + u2 = -1.5 + 2.506944447 Reorder the terms: 2.506944447 + 3.166666667u + u2 = -1.5 + 2.506944447 Combine like terms: -1.5 + 2.506944447 = 1.006944447 2.506944447 + 3.166666667u + u2 = 1.006944447 Factor a perfect square on the left side: (u + 1.583333334)(u + 1.583333334) = 1.006944447 Calculate the square root of the right side: 1.003466216 Break this problem into two subproblems by setting (u + 1.583333334) equal to 1.003466216 and -1.003466216.Subproblem 1
u + 1.583333334 = 1.003466216 Simplifying u + 1.583333334 = 1.003466216 Reorder the terms: 1.583333334 + u = 1.003466216 Solving 1.583333334 + u = 1.003466216 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + u = 1.003466216 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + u = 1.003466216 + -1.583333334 u = 1.003466216 + -1.583333334 Combine like terms: 1.003466216 + -1.583333334 = -0.579867118 u = -0.579867118 Simplifying u = -0.579867118Subproblem 2
u + 1.583333334 = -1.003466216 Simplifying u + 1.583333334 = -1.003466216 Reorder the terms: 1.583333334 + u = -1.003466216 Solving 1.583333334 + u = -1.003466216 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + u = -1.003466216 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + u = -1.003466216 + -1.583333334 u = -1.003466216 + -1.583333334 Combine like terms: -1.003466216 + -1.583333334 = -2.58679955 u = -2.58679955 Simplifying u = -2.58679955Solution
The solution to the problem is based on the solutions from the subproblems. u = {-0.579867118, -2.58679955}
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