11(x^2)+6x-13=0

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


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

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

Solving
-13 + 6x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-1.181818182 + 0.5454545455x + x2 = 0

Move the constant term to the right:

Add '1.181818182' to each side of the equation.
-1.181818182 + 0.5454545455x + 1.181818182 + x2 = 0 + 1.181818182

Reorder the terms:
-1.181818182 + 1.181818182 + 0.5454545455x + x2 = 0 + 1.181818182

Combine like terms: -1.181818182 + 1.181818182 = 0.000000000
0.000000000 + 0.5454545455x + x2 = 0 + 1.181818182
0.5454545455x + x2 = 0 + 1.181818182

Combine like terms: 0 + 1.181818182 = 1.181818182
0.5454545455x + x2 = 1.181818182

The x term is 0.5454545455x.  Take half its coefficient (0.2727272728).
Square it (0.07438016533) and add it to both sides.

Add '0.07438016533' to each side of the equation.
0.5454545455x + 0.07438016533 + x2 = 1.181818182 + 0.07438016533

Reorder the terms:
0.07438016533 + 0.5454545455x + x2 = 1.181818182 + 0.07438016533

Combine like terms: 1.181818182 + 0.07438016533 = 1.25619834733
0.07438016533 + 0.5454545455x + x2 = 1.25619834733

Factor a perfect square on the left side:
(x + 0.2727272728)(x + 0.2727272728) = 1.25619834733

Calculate the square root of the right side: 1.120802546

Break this problem into two subproblems by setting 
(x + 0.2727272728) equal to 1.120802546 and -1.120802546.

Subproblem 1

x + 0.2727272728 = 1.120802546 Simplifying x + 0.2727272728 = 1.120802546 Reorder the terms: 0.2727272728 + x = 1.120802546 Solving 0.2727272728 + x = 1.120802546 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2727272728' to each side of the equation. 0.2727272728 + -0.2727272728 + x = 1.120802546 + -0.2727272728 Combine like terms: 0.2727272728 + -0.2727272728 = 0.0000000000 0.0000000000 + x = 1.120802546 + -0.2727272728 x = 1.120802546 + -0.2727272728 Combine like terms: 1.120802546 + -0.2727272728 = 0.8480752732 x = 0.8480752732 Simplifying x = 0.8480752732

Subproblem 2

x + 0.2727272728 = -1.120802546 Simplifying x + 0.2727272728 = -1.120802546 Reorder the terms: 0.2727272728 + x = -1.120802546 Solving 0.2727272728 + x = -1.120802546 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2727272728' to each side of the equation. 0.2727272728 + -0.2727272728 + x = -1.120802546 + -0.2727272728 Combine like terms: 0.2727272728 + -0.2727272728 = 0.0000000000 0.0000000000 + x = -1.120802546 + -0.2727272728 x = -1.120802546 + -0.2727272728 Combine like terms: -1.120802546 + -0.2727272728 = -1.3935298188 x = -1.3935298188 Simplifying x = -1.3935298188

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8480752732, -1.3935298188}

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