k^2+8k=24

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Solution for k^2+8k=24 equation:


Simplifying
k2 + 8k = 24

Reorder the terms:
8k + k2 = 24

Solving
8k + k2 = 24

Solving for variable 'k'.

Reorder the terms:
-24 + 8k + k2 = 24 + -24

Combine like terms: 24 + -24 = 0
-24 + 8k + k2 = 0

Begin completing the square.

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + 8k + 24 + k2 = 0 + 24

Reorder the terms:
-24 + 24 + 8k + k2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 8k + k2 = 0 + 24
8k + k2 = 0 + 24

Combine like terms: 0 + 24 = 24
8k + k2 = 24

The k term is 8k.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8k + 16 + k2 = 24 + 16

Reorder the terms:
16 + 8k + k2 = 24 + 16

Combine like terms: 24 + 16 = 40
16 + 8k + k2 = 40

Factor a perfect square on the left side:
(k + 4)(k + 4) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(k + 4) equal to 6.32455532 and -6.32455532.

Subproblem 1

k + 4 = 6.32455532 Simplifying k + 4 = 6.32455532 Reorder the terms: 4 + k = 6.32455532 Solving 4 + k = 6.32455532 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + k = 6.32455532 + -4 Combine like terms: 4 + -4 = 0 0 + k = 6.32455532 + -4 k = 6.32455532 + -4 Combine like terms: 6.32455532 + -4 = 2.32455532 k = 2.32455532 Simplifying k = 2.32455532

Subproblem 2

k + 4 = -6.32455532 Simplifying k + 4 = -6.32455532 Reorder the terms: 4 + k = -6.32455532 Solving 4 + k = -6.32455532 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + k = -6.32455532 + -4 Combine like terms: 4 + -4 = 0 0 + k = -6.32455532 + -4 k = -6.32455532 + -4 Combine like terms: -6.32455532 + -4 = -10.32455532 k = -10.32455532 Simplifying k = -10.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. k = {2.32455532, -10.32455532}

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