k^2-12k-33=8

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Solution for k^2-12k-33=8 equation:


Simplifying
k2 + -12k + -33 = 8

Reorder the terms:
-33 + -12k + k2 = 8

Solving
-33 + -12k + k2 = 8

Solving for variable 'k'.

Reorder the terms:
-33 + -8 + -12k + k2 = 8 + -8

Combine like terms: -33 + -8 = -41
-41 + -12k + k2 = 8 + -8

Combine like terms: 8 + -8 = 0
-41 + -12k + k2 = 0

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + -12k + 41 + k2 = 0 + 41

Reorder the terms:
-41 + 41 + -12k + k2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + -12k + k2 = 0 + 41
-12k + k2 = 0 + 41

Combine like terms: 0 + 41 = 41
-12k + k2 = 41

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 = 41 + 36

Reorder the terms:
36 + -12k + k2 = 41 + 36

Combine like terms: 41 + 36 = 77
36 + -12k + k2 = 77

Factor a perfect square on the left side:
(k + -6)(k + -6) = 77

Calculate the square root of the right side: 8.774964387

Break this problem into two subproblems by setting 
(k + -6) equal to 8.774964387 and -8.774964387.

Subproblem 1

k + -6 = 8.774964387 Simplifying k + -6 = 8.774964387 Reorder the terms: -6 + k = 8.774964387 Solving -6 + k = 8.774964387 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 = 8.774964387 + 6 Combine like terms: -6 + 6 = 0 0 + k = 8.774964387 + 6 k = 8.774964387 + 6 Combine like terms: 8.774964387 + 6 = 14.774964387 k = 14.774964387 Simplifying k = 14.774964387

Subproblem 2

k + -6 = -8.774964387 Simplifying k + -6 = -8.774964387 Reorder the terms: -6 + k = -8.774964387 Solving -6 + k = -8.774964387 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 = -8.774964387 + 6 Combine like terms: -6 + 6 = 0 0 + k = -8.774964387 + 6 k = -8.774964387 + 6 Combine like terms: -8.774964387 + 6 = -2.774964387 k = -2.774964387 Simplifying k = -2.774964387

Solution

The solution to the problem is based on the solutions from the subproblems. k = {14.774964387, -2.774964387}

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