k^2-5k-8=6

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Solution for k^2-5k-8=6 equation:


Simplifying
k2 + -5k + -8 = 6

Reorder the terms:
-8 + -5k + k2 = 6

Solving
-8 + -5k + k2 = 6

Solving for variable 'k'.

Reorder the terms:
-8 + -6 + -5k + k2 = 6 + -6

Combine like terms: -8 + -6 = -14
-14 + -5k + k2 = 6 + -6

Combine like terms: 6 + -6 = 0
-14 + -5k + k2 = 0

Factor a trinomial.
(-2 + -1k)(7 + -1k) = 0

Subproblem 1

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 = -2

Subproblem 2

Set the factor '(7 + -1k)' equal to zero and attempt to solve: Simplifying 7 + -1k = 0 Solving 7 + -1k = 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 + -1k = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1k = 0 + -7 -1k = 0 + -7 Combine like terms: 0 + -7 = -7 -1k = -7 Divide each side by '-1'. k = 7 Simplifying k = 7

Solution

k = {-2, 7}

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