4k+4=k^2

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Solution for 4k+4=k^2 equation:


Simplifying
4k + 4 = k2

Reorder the terms:
4 + 4k = k2

Solving
4 + 4k = k2

Solving for variable 'k'.

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

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

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

Move the constant term to the right:

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

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

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

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

The k term is -4k.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

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

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

Combine like terms: 4 + 4 = 8
4 + -4k + k2 = 8

Factor a perfect square on the left side:
(k + -2)(k + -2) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(k + -2) equal to 2.828427125 and -2.828427125.

Subproblem 1

k + -2 = 2.828427125 Simplifying k + -2 = 2.828427125 Reorder the terms: -2 + k = 2.828427125 Solving -2 + k = 2.828427125 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + k = 2.828427125 + 2 Combine like terms: -2 + 2 = 0 0 + k = 2.828427125 + 2 k = 2.828427125 + 2 Combine like terms: 2.828427125 + 2 = 4.828427125 k = 4.828427125 Simplifying k = 4.828427125

Subproblem 2

k + -2 = -2.828427125 Simplifying k + -2 = -2.828427125 Reorder the terms: -2 + k = -2.828427125 Solving -2 + k = -2.828427125 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + k = -2.828427125 + 2 Combine like terms: -2 + 2 = 0 0 + k = -2.828427125 + 2 k = -2.828427125 + 2 Combine like terms: -2.828427125 + 2 = -0.828427125 k = -0.828427125 Simplifying k = -0.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. k = {4.828427125, -0.828427125}

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