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Simplifying (5k + -9)(2k + -4) = 0 Reorder the terms: (-9 + 5k)(2k + -4) = 0 Reorder the terms: (-9 + 5k)(-4 + 2k) = 0 Multiply (-9 + 5k) * (-4 + 2k) (-9(-4 + 2k) + 5k * (-4 + 2k)) = 0 ((-4 * -9 + 2k * -9) + 5k * (-4 + 2k)) = 0 ((36 + -18k) + 5k * (-4 + 2k)) = 0 (36 + -18k + (-4 * 5k + 2k * 5k)) = 0 (36 + -18k + (-20k + 10k2)) = 0 Combine like terms: -18k + -20k = -38k (36 + -38k + 10k2) = 0 Solving 36 + -38k + 10k2 = 0 Solving for variable 'k'. Factor out the Greatest Common Factor (GCF), '2'. 2(18 + -19k + 5k2) = 0 Factor a trinomial. 2((9 + -5k)(2 + -1k)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(9 + -5k)' equal to zero and attempt to solve: Simplifying 9 + -5k = 0 Solving 9 + -5k = 0 Move all terms containing k to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5k = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5k = 0 + -9 -5k = 0 + -9 Combine like terms: 0 + -9 = -9 -5k = -9 Divide each side by '-5'. k = 1.8 Simplifying k = 1.8Subproblem 2
Set the factor '(2 + -1k)' equal to zero and attempt to solve: Simplifying 2 + -1k = 0 Solving 2 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1k = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1k = 0 + -2 -1k = 0 + -2 Combine like terms: 0 + -2 = -2 -1k = -2 Divide each side by '-1'. k = 2 Simplifying k = 2Solution
k = {1.8, 2}
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