6x^2+11x=13

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Solution for 6x^2+11x=13 equation:


Simplifying
6x2 + 11x = 13

Reorder the terms:
11x + 6x2 = 13

Solving
11x + 6x2 = 13

Solving for variable 'x'.

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

Combine like terms: 13 + -13 = 0
-13 + 11x + 6x2 = 0

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 = 0.8173876705 x = 0.8173876705 Simplifying x = 0.8173876705

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 = -2.6507210035 x = -2.6507210035 Simplifying x = -2.6507210035

Solution

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

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