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Simplifying k2 + -12k + 40 = 0 Reorder the terms: 40 + -12k + k2 = 0 Solving 40 + -12k + k2 = 0 Solving for variable 'k'. Begin completing the square. Move the constant term to the right: Add '-40' to each side of the equation. 40 + -12k + -40 + k2 = 0 + -40 Reorder the terms: 40 + -40 + -12k + k2 = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -12k + k2 = 0 + -40 -12k + k2 = 0 + -40 Combine like terms: 0 + -40 = -40 -12k + k2 = -40 The k term is -12k. Take half its coefficient (-6). Square it (36) and add it to both sides. Add '36' to each side of the equation. -12k + 36 + k2 = -40 + 36 Reorder the terms: 36 + -12k + k2 = -40 + 36 Combine like terms: -40 + 36 = -4 36 + -12k + k2 = -4 Factor a perfect square on the left side: (k + -6)(k + -6) = -4 Can't calculate square root of the right side. The solution to this equation could not be determined.
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