k^2-15k=-56

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Solution for k^2-15k=-56 equation:


Simplifying
k2 + -15k = -56

Reorder the terms:
-15k + k2 = -56

Solving
-15k + k2 = -56

Solving for variable 'k'.

Reorder the terms:
56 + -15k + k2 = -56 + 56

Combine like terms: -56 + 56 = 0
56 + -15k + k2 = 0

Factor a trinomial.
(7 + -1k)(8 + -1k) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(8 + -1k)' equal to zero and attempt to solve: Simplifying 8 + -1k = 0 Solving 8 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1k = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1k = 0 + -8 -1k = 0 + -8 Combine like terms: 0 + -8 = -8 -1k = -8 Divide each side by '-1'. k = 8 Simplifying k = 8

Solution

k = {7, 8}

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