0=4k^2+4k-27

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Solution for 0=4k^2+4k-27 equation:


Simplifying
0 = 4k2 + 4k + -27

Reorder the terms:
0 = -27 + 4k + 4k2

Solving
0 = -27 + 4k + 4k2

Solving for variable 'k'.

Combine like terms: 0 + 27 = 27
27 + -4k + -4k2 = -27 + 4k + 4k2 + 27 + -4k + -4k2

Reorder the terms:
27 + -4k + -4k2 = -27 + 27 + 4k + -4k + 4k2 + -4k2

Combine like terms: -27 + 27 = 0
27 + -4k + -4k2 = 0 + 4k + -4k + 4k2 + -4k2
27 + -4k + -4k2 = 4k + -4k + 4k2 + -4k2

Combine like terms: 4k + -4k = 0
27 + -4k + -4k2 = 0 + 4k2 + -4k2
27 + -4k + -4k2 = 4k2 + -4k2

Combine like terms: 4k2 + -4k2 = 0
27 + -4k + -4k2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-6.75 + k + k2 = 0

Move the constant term to the right:

Add '6.75' to each side of the equation.
-6.75 + k + 6.75 + k2 = 0 + 6.75

Reorder the terms:
-6.75 + 6.75 + k + k2 = 0 + 6.75

Combine like terms: -6.75 + 6.75 = 0.00
0.00 + k + k2 = 0 + 6.75
k + k2 = 0 + 6.75

Combine like terms: 0 + 6.75 = 6.75
k + k2 = 6.75

The k term is k.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + k2 = 6.75 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + k2 = 6.75 + 0.25

Combine like terms: 6.75 + 0.25 = 7
1.25 + k2 = 7

Factor a perfect square on the left side:
(k + 0.5)(k + 0.5) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(k + 0.5) equal to 2.645751311 and -2.645751311.

Subproblem 1

k + 0.5 = 2.645751311 Simplifying k + 0.5 = 2.645751311 Reorder the terms: 0.5 + k = 2.645751311 Solving 0.5 + k = 2.645751311 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + k = 2.645751311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = 2.645751311 + -0.5 k = 2.645751311 + -0.5 Combine like terms: 2.645751311 + -0.5 = 2.145751311 k = 2.145751311 Simplifying k = 2.145751311

Subproblem 2

k + 0.5 = -2.645751311 Simplifying k + 0.5 = -2.645751311 Reorder the terms: 0.5 + k = -2.645751311 Solving 0.5 + k = -2.645751311 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + k = -2.645751311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = -2.645751311 + -0.5 k = -2.645751311 + -0.5 Combine like terms: -2.645751311 + -0.5 = -3.145751311 k = -3.145751311 Simplifying k = -3.145751311

Solution

The solution to the problem is based on the solutions from the subproblems. k = {2.145751311, -3.145751311}

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