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Simplifying 15k2 + -39k + -84 = 0 Reorder the terms: -84 + -39k + 15k2 = 0 Solving -84 + -39k + 15k2 = 0 Solving for variable 'k'. Factor out the Greatest Common Factor (GCF), '3'. 3(-28 + -13k + 5k2) = 0 Factor a trinomial. 3((-7 + -5k)(4 + -1k)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-7 + -5k)' equal to zero and attempt to solve: Simplifying -7 + -5k = 0 Solving -7 + -5k = 0 Move all terms containing k to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -5k = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -5k = 0 + 7 -5k = 0 + 7 Combine like terms: 0 + 7 = 7 -5k = 7 Divide each side by '-5'. k = -1.4 Simplifying k = -1.4Subproblem 2
Set the factor '(4 + -1k)' equal to zero and attempt to solve: Simplifying 4 + -1k = 0 Solving 4 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1k = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1k = 0 + -4 -1k = 0 + -4 Combine like terms: 0 + -4 = -4 -1k = -4 Divide each side by '-1'. k = 4 Simplifying k = 4Solution
k = {-1.4, 4}
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