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Simplifying c2 + -18c + 126 = 0 Reorder the terms: 126 + -18c + c2 = 0 Solving 126 + -18c + c2 = 0 Solving for variable 'c'. Begin completing the square. Move the constant term to the right: Add '-126' to each side of the equation. 126 + -18c + -126 + c2 = 0 + -126 Reorder the terms: 126 + -126 + -18c + c2 = 0 + -126 Combine like terms: 126 + -126 = 0 0 + -18c + c2 = 0 + -126 -18c + c2 = 0 + -126 Combine like terms: 0 + -126 = -126 -18c + c2 = -126 The c term is -18c. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18c + 81 + c2 = -126 + 81 Reorder the terms: 81 + -18c + c2 = -126 + 81 Combine like terms: -126 + 81 = -45 81 + -18c + c2 = -45 Factor a perfect square on the left side: (c + -9)(c + -9) = -45 Can't calculate square root of the right side. The solution to this equation could not be determined.
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