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Simplifying u2 + 6u + 18 = 0 Reorder the terms: 18 + 6u + u2 = 0 Solving 18 + 6u + u2 = 0 Solving for variable 'u'. Begin completing the square. Move the constant term to the right: Add '-18' to each side of the equation. 18 + 6u + -18 + u2 = 0 + -18 Reorder the terms: 18 + -18 + 6u + u2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + 6u + u2 = 0 + -18 6u + u2 = 0 + -18 Combine like terms: 0 + -18 = -18 6u + u2 = -18 The u term is 6u. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6u + 9 + u2 = -18 + 9 Reorder the terms: 9 + 6u + u2 = -18 + 9 Combine like terms: -18 + 9 = -9 9 + 6u + u2 = -9 Factor a perfect square on the left side: (u + 3)(u + 3) = -9 Can't calculate square root of the right side. The solution to this equation could not be determined.
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