k^2+11k=14

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Solution for k^2+11k=14 equation:


Simplifying
k2 + 11k = 14

Reorder the terms:
11k + k2 = 14

Solving
11k + k2 = 14

Solving for variable 'k'.

Reorder the terms:
-14 + 11k + k2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + 11k + k2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 11k + 14 + k2 = 0 + 14

Reorder the terms:
-14 + 14 + 11k + k2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 11k + k2 = 0 + 14
11k + k2 = 0 + 14

Combine like terms: 0 + 14 = 14
11k + k2 = 14

The k term is 11k.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11k + 30.25 + k2 = 14 + 30.25

Reorder the terms:
30.25 + 11k + k2 = 14 + 30.25

Combine like terms: 14 + 30.25 = 44.25
30.25 + 11k + k2 = 44.25

Factor a perfect square on the left side:
(k + 5.5)(k + 5.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(k + 5.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

k + 5.5 = 6.652067348 Simplifying k + 5.5 = 6.652067348 Reorder the terms: 5.5 + k = 6.652067348 Solving 5.5 + k = 6.652067348 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + k = 6.652067348 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + k = 6.652067348 + -5.5 k = 6.652067348 + -5.5 Combine like terms: 6.652067348 + -5.5 = 1.152067348 k = 1.152067348 Simplifying k = 1.152067348

Subproblem 2

k + 5.5 = -6.652067348 Simplifying k + 5.5 = -6.652067348 Reorder the terms: 5.5 + k = -6.652067348 Solving 5.5 + k = -6.652067348 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + k = -6.652067348 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + k = -6.652067348 + -5.5 k = -6.652067348 + -5.5 Combine like terms: -6.652067348 + -5.5 = -12.152067348 k = -12.152067348 Simplifying k = -12.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.152067348, -12.152067348}

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