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Simplifying u2 + -18u = -160 Reorder the terms: -18u + u2 = -160 Solving -18u + u2 = -160 Solving for variable 'u'. Reorder the terms: 160 + -18u + u2 = -160 + 160 Combine like terms: -160 + 160 = 0 160 + -18u + u2 = 0 Begin completing the square. Move the constant term to the right: Add '-160' to each side of the equation. 160 + -18u + -160 + u2 = 0 + -160 Reorder the terms: 160 + -160 + -18u + u2 = 0 + -160 Combine like terms: 160 + -160 = 0 0 + -18u + u2 = 0 + -160 -18u + u2 = 0 + -160 Combine like terms: 0 + -160 = -160 -18u + u2 = -160 The u term is -18u. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18u + 81 + u2 = -160 + 81 Reorder the terms: 81 + -18u + u2 = -160 + 81 Combine like terms: -160 + 81 = -79 81 + -18u + u2 = -79 Factor a perfect square on the left side: (u + -9)(u + -9) = -79 Can't calculate square root of the right side. The solution to this equation could not be determined.
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