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Simplifying (2k2 + -4k + 5) = 0 Reorder the terms: (5 + -4k + 2k2) = 0 Remove parenthesis around (5 + -4k + 2k2) 5 + -4k + 2k2 = 0 Solving 5 + -4k + 2k2 = 0 Solving for variable 'k'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 2.5 + -2k + k2 = 0 Move the constant term to the right: Add '-2.5' to each side of the equation. 2.5 + -2k + -2.5 + k2 = 0 + -2.5 Reorder the terms: 2.5 + -2.5 + -2k + k2 = 0 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + -2k + k2 = 0 + -2.5 -2k + k2 = 0 + -2.5 Combine like terms: 0 + -2.5 = -2.5 -2k + k2 = -2.5 The k term is -2k. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2k + 1 + k2 = -2.5 + 1 Reorder the terms: 1 + -2k + k2 = -2.5 + 1 Combine like terms: -2.5 + 1 = -1.5 1 + -2k + k2 = -1.5 Factor a perfect square on the left side: (k + -1)(k + -1) = -1.5 Can't calculate square root of the right side. The solution to this equation could not be determined.
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