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Simplifying 9k2 + 7 = -12k Reorder the terms: 7 + 9k2 = -12k Solving 7 + 9k2 = -12k Solving for variable 'k'. Reorder the terms: 7 + 12k + 9k2 = -12k + 12k Combine like terms: -12k + 12k = 0 7 + 12k + 9k2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 0.7777777778 + 1.333333333k + k2 = 0 Move the constant term to the right: Add '-0.7777777778' to each side of the equation. 0.7777777778 + 1.333333333k + -0.7777777778 + k2 = 0 + -0.7777777778 Reorder the terms: 0.7777777778 + -0.7777777778 + 1.333333333k + k2 = 0 + -0.7777777778 Combine like terms: 0.7777777778 + -0.7777777778 = 0.0000000000 0.0000000000 + 1.333333333k + k2 = 0 + -0.7777777778 1.333333333k + k2 = 0 + -0.7777777778 Combine like terms: 0 + -0.7777777778 = -0.7777777778 1.333333333k + k2 = -0.7777777778 The k term is 1.333333333k. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333k + 0.4444444442 + k2 = -0.7777777778 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333k + k2 = -0.7777777778 + 0.4444444442 Combine like terms: -0.7777777778 + 0.4444444442 = -0.3333333336 0.4444444442 + 1.333333333k + k2 = -0.3333333336 Factor a perfect square on the left side: (k + 0.6666666665)(k + 0.6666666665) = -0.3333333336 Can't calculate square root of the right side. The solution to this equation could not be determined.
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