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Simplifying 6k2 + 12k + 15 = 0 Reorder the terms: 15 + 12k + 6k2 = 0 Solving 15 + 12k + 6k2 = 0 Solving for variable 'k'. Factor out the Greatest Common Factor (GCF), '3'. 3(5 + 4k + 2k2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(5 + 4k + 2k2)' equal to zero and attempt to solve: Simplifying 5 + 4k + 2k2 = 0 Solving 5 + 4k + 2k2 = 0 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. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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