k^2-12k-180=0

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Solution for k^2-12k-180=0 equation:


Simplifying
k2 + -12k + -180 = 0

Reorder the terms:
-180 + -12k + k2 = 0

Solving
-180 + -12k + k2 = 0

Solving for variable 'k'.

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + -12k + 180 + k2 = 0 + 180

Reorder the terms:
-180 + 180 + -12k + k2 = 0 + 180

Combine like terms: -180 + 180 = 0
0 + -12k + k2 = 0 + 180
-12k + k2 = 0 + 180

Combine like terms: 0 + 180 = 180
-12k + k2 = 180

The k term is -12k.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12k + 36 + k2 = 180 + 36

Reorder the terms:
36 + -12k + k2 = 180 + 36

Combine like terms: 180 + 36 = 216
36 + -12k + k2 = 216

Factor a perfect square on the left side:
(k + -6)(k + -6) = 216

Calculate the square root of the right side: 14.696938457

Break this problem into two subproblems by setting 
(k + -6) equal to 14.696938457 and -14.696938457.

Subproblem 1

k + -6 = 14.696938457 Simplifying k + -6 = 14.696938457 Reorder the terms: -6 + k = 14.696938457 Solving -6 + k = 14.696938457 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + k = 14.696938457 + 6 Combine like terms: -6 + 6 = 0 0 + k = 14.696938457 + 6 k = 14.696938457 + 6 Combine like terms: 14.696938457 + 6 = 20.696938457 k = 20.696938457 Simplifying k = 20.696938457

Subproblem 2

k + -6 = -14.696938457 Simplifying k + -6 = -14.696938457 Reorder the terms: -6 + k = -14.696938457 Solving -6 + k = -14.696938457 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + k = -14.696938457 + 6 Combine like terms: -6 + 6 = 0 0 + k = -14.696938457 + 6 k = -14.696938457 + 6 Combine like terms: -14.696938457 + 6 = -8.696938457 k = -8.696938457 Simplifying k = -8.696938457

Solution

The solution to the problem is based on the solutions from the subproblems. k = {20.696938457, -8.696938457}

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