0=x^2-12x-6

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Solution for 0=x^2-12x-6 equation:


Simplifying
0 = x2 + -12x + -6

Reorder the terms:
0 = -6 + -12x + x2

Solving
0 = -6 + -12x + x2

Solving for variable 'x'.

Combine like terms: 0 + 6 = 6
6 + 12x + -1x2 = -6 + -12x + x2 + 6 + 12x + -1x2

Reorder the terms:
6 + 12x + -1x2 = -6 + 6 + -12x + 12x + x2 + -1x2

Combine like terms: -6 + 6 = 0
6 + 12x + -1x2 = 0 + -12x + 12x + x2 + -1x2
6 + 12x + -1x2 = -12x + 12x + x2 + -1x2

Combine like terms: -12x + 12x = 0
6 + 12x + -1x2 = 0 + x2 + -1x2
6 + 12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
6 + 12x + -1x2 = 0

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

Divide each side by '-1'.
-6 + -12x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -12x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -12x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -12x + x2 = 0 + 6
-12x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-12x + x2 = 6

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = 6 + 36

Reorder the terms:
36 + -12x + x2 = 6 + 36

Combine like terms: 6 + 36 = 42
36 + -12x + x2 = 42

Factor a perfect square on the left side:
(x + -6)(x + -6) = 42

Calculate the square root of the right side: 6.480740698

Break this problem into two subproblems by setting 
(x + -6) equal to 6.480740698 and -6.480740698.

Subproblem 1

x + -6 = 6.480740698 Simplifying x + -6 = 6.480740698 Reorder the terms: -6 + x = 6.480740698 Solving -6 + x = 6.480740698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 6.480740698 + 6 Combine like terms: -6 + 6 = 0 0 + x = 6.480740698 + 6 x = 6.480740698 + 6 Combine like terms: 6.480740698 + 6 = 12.480740698 x = 12.480740698 Simplifying x = 12.480740698

Subproblem 2

x + -6 = -6.480740698 Simplifying x + -6 = -6.480740698 Reorder the terms: -6 + x = -6.480740698 Solving -6 + x = -6.480740698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -6.480740698 + 6 Combine like terms: -6 + 6 = 0 0 + x = -6.480740698 + 6 x = -6.480740698 + 6 Combine like terms: -6.480740698 + 6 = -0.480740698 x = -0.480740698 Simplifying x = -0.480740698

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.480740698, -0.480740698}

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