6x^2-11x-13=0

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Solution for 6x^2-11x-13=0 equation: 


Simplifying
6x2 + -11x + -13 = 0

Reorder the terms:
-13 + -11x + 6x2 = 0

Solving
-13 + -11x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-2.166666667 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '2.166666667' to each side of the equation.
-2.166666667 + -1.833333333x + 2.166666667 + x2 = 0 + 2.166666667

Reorder the terms:
-2.166666667 + 2.166666667 + -1.833333333x + x2 = 0 + 2.166666667

Combine like terms: -2.166666667 + 2.166666667 = 0.000000000
0.000000000 + -1.833333333x + x2 = 0 + 2.166666667
-1.833333333x + x2 = 0 + 2.166666667

Combine like terms: 0 + 2.166666667 = 2.166666667
-1.833333333x + x2 = 2.166666667

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 2.166666667 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 2.166666667 + 0.8402777775

Combine like terms: 2.166666667 + 0.8402777775 = 3.0069444445
0.8402777775 + -1.833333333x + x2 = 3.0069444445

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 3.0069444445

Calculate the square root of the right side: 1.734054337

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 1.734054337 and -1.734054337.


Subproblem 1
x + -0.9166666665 = 1.734054337

Simplifying
x + -0.9166666665 = 1.734054337

Reorder the terms:
-0.9166666665 + x = 1.734054337

Solving
-0.9166666665 + x = 1.734054337

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.9166666665' to each side of the equation.
-0.9166666665 + 0.9166666665 + x = 1.734054337 + 0.9166666665

Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000
0.0000000000 + x = 1.734054337 + 0.9166666665
x = 1.734054337 + 0.9166666665

Combine like terms: 1.734054337 + 0.9166666665 = 2.6507210035
x = 2.6507210035

Simplifying
x = 2.6507210035


Subproblem 2
x + -0.9166666665 = -1.734054337

Simplifying
x + -0.9166666665 = -1.734054337

Reorder the terms:
-0.9166666665 + x = -1.734054337

Solving
-0.9166666665 + x = -1.734054337

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.9166666665' to each side of the equation.
-0.9166666665 + 0.9166666665 + x = -1.734054337 + 0.9166666665

Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000
0.0000000000 + x = -1.734054337 + 0.9166666665
x = -1.734054337 + 0.9166666665

Combine like terms: -1.734054337 + 0.9166666665 = -0.8173876705
x = -0.8173876705

Simplifying
x = -0.8173876705


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {2.6507210035, -0.8173876705}

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