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Simplifying c2 + -1c + 13 = 0 Reorder the terms: 13 + -1c + c2 = 0 Solving 13 + -1c + c2 = 0 Solving for variable 'c'. Begin completing the square. Move the constant term to the right: Add '-13' to each side of the equation. 13 + -1c + -13 + c2 = 0 + -13 Reorder the terms: 13 + -13 + -1c + c2 = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1c + c2 = 0 + -13 -1c + c2 = 0 + -13 Combine like terms: 0 + -13 = -13 -1c + c2 = -13 The c term is -1c. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1c + 0.25 + c2 = -13 + 0.25 Reorder the terms: 0.25 + -1c + c2 = -13 + 0.25 Combine like terms: -13 + 0.25 = -12.75 0.25 + -1c + c2 = -12.75 Factor a perfect square on the left side: (c + -0.5)(c + -0.5) = -12.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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