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Simplifying v2 + -18v + 91 = 0 Reorder the terms: 91 + -18v + v2 = 0 Solving 91 + -18v + v2 = 0 Solving for variable 'v'. Begin completing the square. Move the constant term to the right: Add '-91' to each side of the equation. 91 + -18v + -91 + v2 = 0 + -91 Reorder the terms: 91 + -91 + -18v + v2 = 0 + -91 Combine like terms: 91 + -91 = 0 0 + -18v + v2 = 0 + -91 -18v + v2 = 0 + -91 Combine like terms: 0 + -91 = -91 -18v + v2 = -91 The v term is -18v. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18v + 81 + v2 = -91 + 81 Reorder the terms: 81 + -18v + v2 = -91 + 81 Combine like terms: -91 + 81 = -10 81 + -18v + v2 = -10 Factor a perfect square on the left side: (v + -9)(v + -9) = -10 Can't calculate square root of the right side. The solution to this equation could not be determined.
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