x^2-4x-108=0

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Solution for x^2-4x-108=0 equation:


Simplifying
x2 + -4x + -108 = 0

Reorder the terms:
-108 + -4x + x2 = 0

Solving
-108 + -4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '108' to each side of the equation.
-108 + -4x + 108 + x2 = 0 + 108

Reorder the terms:
-108 + 108 + -4x + x2 = 0 + 108

Combine like terms: -108 + 108 = 0
0 + -4x + x2 = 0 + 108
-4x + x2 = 0 + 108

Combine like terms: 0 + 108 = 108
-4x + x2 = 108

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

Add '4' to each side of the equation.
-4x + 4 + x2 = 108 + 4

Reorder the terms:
4 + -4x + x2 = 108 + 4

Combine like terms: 108 + 4 = 112
4 + -4x + x2 = 112

Factor a perfect square on the left side:
(x + -2)(x + -2) = 112

Calculate the square root of the right side: 10.583005244

Break this problem into two subproblems by setting 
(x + -2) equal to 10.583005244 and -10.583005244.

Subproblem 1

x + -2 = 10.583005244 Simplifying x + -2 = 10.583005244 Reorder the terms: -2 + x = 10.583005244 Solving -2 + x = 10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 10.583005244 + 2 Combine like terms: -2 + 2 = 0 0 + x = 10.583005244 + 2 x = 10.583005244 + 2 Combine like terms: 10.583005244 + 2 = 12.583005244 x = 12.583005244 Simplifying x = 12.583005244

Subproblem 2

x + -2 = -10.583005244 Simplifying x + -2 = -10.583005244 Reorder the terms: -2 + x = -10.583005244 Solving -2 + x = -10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -10.583005244 + 2 Combine like terms: -2 + 2 = 0 0 + x = -10.583005244 + 2 x = -10.583005244 + 2 Combine like terms: -10.583005244 + 2 = -8.583005244 x = -8.583005244 Simplifying x = -8.583005244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.583005244, -8.583005244}

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