k+4*k+4=k*k

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Solution for k+4*k+4=k*k equation:


Simplifying
k + 4k + 4 = k * k

Reorder the terms:
4 + k + 4k = k * k

Combine like terms: k + 4k = 5k
4 + 5k = k * k

Multiply k * k
4 + 5k = k2

Solving
4 + 5k = k2

Solving for variable 'k'.

Combine like terms: k2 + -1k2 = 0
4 + 5k + -1k2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-4 + -5k + k2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -5k + 4 + k2 = 0 + 4

Reorder the terms:
-4 + 4 + -5k + k2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5k + k2 = 0 + 4
-5k + k2 = 0 + 4

Combine like terms: 0 + 4 = 4
-5k + k2 = 4

The k term is -5k.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5k + 6.25 + k2 = 4 + 6.25

Reorder the terms:
6.25 + -5k + k2 = 4 + 6.25

Combine like terms: 4 + 6.25 = 10.25
6.25 + -5k + k2 = 10.25

Factor a perfect square on the left side:
(k + -2.5)(k + -2.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(k + -2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

k + -2.5 = 3.201562119 Simplifying k + -2.5 = 3.201562119 Reorder the terms: -2.5 + k = 3.201562119 Solving -2.5 + k = 3.201562119 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + k = 3.201562119 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + k = 3.201562119 + 2.5 k = 3.201562119 + 2.5 Combine like terms: 3.201562119 + 2.5 = 5.701562119 k = 5.701562119 Simplifying k = 5.701562119

Subproblem 2

k + -2.5 = -3.201562119 Simplifying k + -2.5 = -3.201562119 Reorder the terms: -2.5 + k = -3.201562119 Solving -2.5 + k = -3.201562119 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + k = -3.201562119 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + k = -3.201562119 + 2.5 k = -3.201562119 + 2.5 Combine like terms: -3.201562119 + 2.5 = -0.701562119 k = -0.701562119 Simplifying k = -0.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. k = {5.701562119, -0.701562119}

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