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Simplifying 64 + -1(k + -7)(k + -7) = 0 Reorder the terms: 64 + -1(-7 + k)(k + -7) = 0 Reorder the terms: 64 + -1(-7 + k)(-7 + k) = 0 Multiply (-7 + k) * (-7 + k) 64 + -1(-7(-7 + k) + k(-7 + k)) = 0 64 + -1((-7 * -7 + k * -7) + k(-7 + k)) = 0 64 + -1((49 + -7k) + k(-7 + k)) = 0 64 + -1(49 + -7k + (-7 * k + k * k)) = 0 64 + -1(49 + -7k + (-7k + k2)) = 0 Combine like terms: -7k + -7k = -14k 64 + -1(49 + -14k + k2) = 0 64 + (49 * -1 + -14k * -1 + k2 * -1) = 0 64 + (-49 + 14k + -1k2) = 0 Combine like terms: 64 + -49 = 15 15 + 14k + -1k2 = 0 Solving 15 + 14k + -1k2 = 0 Solving for variable 'k'. Factor a trinomial. (15 + -1k)(1 + k) = 0Subproblem 1
Set the factor '(15 + -1k)' equal to zero and attempt to solve: Simplifying 15 + -1k = 0 Solving 15 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1k = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1k = 0 + -15 -1k = 0 + -15 Combine like terms: 0 + -15 = -15 -1k = -15 Divide each side by '-1'. k = 15 Simplifying k = 15Subproblem 2
Set the factor '(1 + k)' equal to zero and attempt to solve: Simplifying 1 + k = 0 Solving 1 + k = 0 Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = 0 + -1 Combine like terms: 1 + -1 = 0 0 + k = 0 + -1 k = 0 + -1 Combine like terms: 0 + -1 = -1 k = -1 Simplifying k = -1Solution
k = {15, -1}
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