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Simplifying 9u2 + 15u + 25 = 0 Reorder the terms: 25 + 15u + 9u2 = 0 Solving 25 + 15u + 9u2 = 0 Solving for variable 'u'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 2.777777778 + 1.666666667u + u2 = 0 Move the constant term to the right: Add '-2.777777778' to each side of the equation. 2.777777778 + 1.666666667u + -2.777777778 + u2 = 0 + -2.777777778 Reorder the terms: 2.777777778 + -2.777777778 + 1.666666667u + u2 = 0 + -2.777777778 Combine like terms: 2.777777778 + -2.777777778 = 0.000000000 0.000000000 + 1.666666667u + u2 = 0 + -2.777777778 1.666666667u + u2 = 0 + -2.777777778 Combine like terms: 0 + -2.777777778 = -2.777777778 1.666666667u + u2 = -2.777777778 The u term is 1.666666667u. Take half its coefficient (0.8333333335). Square it (0.6944444447) and add it to both sides. Add '0.6944444447' to each side of the equation. 1.666666667u + 0.6944444447 + u2 = -2.777777778 + 0.6944444447 Reorder the terms: 0.6944444447 + 1.666666667u + u2 = -2.777777778 + 0.6944444447 Combine like terms: -2.777777778 + 0.6944444447 = -2.0833333333 0.6944444447 + 1.666666667u + u2 = -2.0833333333 Factor a perfect square on the left side: (u + 0.8333333335)(u + 0.8333333335) = -2.0833333333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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