11x^2-10x-13=0

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Solution for 11x^2-10x-13=0 equation:


Simplifying
11x2 + -10x + -13 = 0

Reorder the terms:
-13 + -10x + 11x2 = 0

Solving
-13 + -10x + 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 + -0.9090909091x + x2 = 0

Move the constant term to the right:

Add '1.181818182' to each side of the equation.
-1.181818182 + -0.9090909091x + 1.181818182 + x2 = 0 + 1.181818182

Reorder the terms:
-1.181818182 + 1.181818182 + -0.9090909091x + x2 = 0 + 1.181818182

Combine like terms: -1.181818182 + 1.181818182 = 0.000000000
0.000000000 + -0.9090909091x + x2 = 0 + 1.181818182
-0.9090909091x + x2 = 0 + 1.181818182

Combine like terms: 0 + 1.181818182 = 1.181818182
-0.9090909091x + x2 = 1.181818182

The x term is -0.9090909091x.  Take half its coefficient (-0.4545454546).
Square it (0.2066115703) and add it to both sides.

Add '0.2066115703' to each side of the equation.
-0.9090909091x + 0.2066115703 + x2 = 1.181818182 + 0.2066115703

Reorder the terms:
0.2066115703 + -0.9090909091x + x2 = 1.181818182 + 0.2066115703

Combine like terms: 1.181818182 + 0.2066115703 = 1.3884297523
0.2066115703 + -0.9090909091x + x2 = 1.3884297523

Factor a perfect square on the left side:
(x + -0.4545454546)(x + -0.4545454546) = 1.3884297523

Calculate the square root of the right side: 1.178316491

Break this problem into two subproblems by setting 
(x + -0.4545454546) equal to 1.178316491 and -1.178316491.

Subproblem 1

x + -0.4545454546 = 1.178316491 Simplifying x + -0.4545454546 = 1.178316491 Reorder the terms: -0.4545454546 + x = 1.178316491 Solving -0.4545454546 + x = 1.178316491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4545454546' to each side of the equation. -0.4545454546 + 0.4545454546 + x = 1.178316491 + 0.4545454546 Combine like terms: -0.4545454546 + 0.4545454546 = 0.0000000000 0.0000000000 + x = 1.178316491 + 0.4545454546 x = 1.178316491 + 0.4545454546 Combine like terms: 1.178316491 + 0.4545454546 = 1.6328619456 x = 1.6328619456 Simplifying x = 1.6328619456

Subproblem 2

x + -0.4545454546 = -1.178316491 Simplifying x + -0.4545454546 = -1.178316491 Reorder the terms: -0.4545454546 + x = -1.178316491 Solving -0.4545454546 + x = -1.178316491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4545454546' to each side of the equation. -0.4545454546 + 0.4545454546 + x = -1.178316491 + 0.4545454546 Combine like terms: -0.4545454546 + 0.4545454546 = 0.0000000000 0.0000000000 + x = -1.178316491 + 0.4545454546 x = -1.178316491 + 0.4545454546 Combine like terms: -1.178316491 + 0.4545454546 = -0.7237710364 x = -0.7237710364 Simplifying x = -0.7237710364

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.6328619456, -0.7237710364}

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