11x^2+141x-108=0

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Solution for 11x^2+141x-108=0 equation:


Simplifying
11x2 + 141x + -108 = 0

Reorder the terms:
-108 + 141x + 11x2 = 0

Solving
-108 + 141x + 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'.
-9.818181818 + 12.81818182x + x2 = 0

Move the constant term to the right:

Add '9.818181818' to each side of the equation.
-9.818181818 + 12.81818182x + 9.818181818 + x2 = 0 + 9.818181818

Reorder the terms:
-9.818181818 + 9.818181818 + 12.81818182x + x2 = 0 + 9.818181818

Combine like terms: -9.818181818 + 9.818181818 = 0.000000000
0.000000000 + 12.81818182x + x2 = 0 + 9.818181818
12.81818182x + x2 = 0 + 9.818181818

Combine like terms: 0 + 9.818181818 = 9.818181818
12.81818182x + x2 = 9.818181818

The x term is 12.81818182x.  Take half its coefficient (6.40909091).
Square it (41.07644629) and add it to both sides.

Add '41.07644629' to each side of the equation.
12.81818182x + 41.07644629 + x2 = 9.818181818 + 41.07644629

Reorder the terms:
41.07644629 + 12.81818182x + x2 = 9.818181818 + 41.07644629

Combine like terms: 9.818181818 + 41.07644629 = 50.894628108
41.07644629 + 12.81818182x + x2 = 50.894628108

Factor a perfect square on the left side:
(x + 6.40909091)(x + 6.40909091) = 50.894628108

Calculate the square root of the right side: 7.134047106

Break this problem into two subproblems by setting 
(x + 6.40909091) equal to 7.134047106 and -7.134047106.

Subproblem 1

x + 6.40909091 = 7.134047106 Simplifying x + 6.40909091 = 7.134047106 Reorder the terms: 6.40909091 + x = 7.134047106 Solving 6.40909091 + x = 7.134047106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.40909091' to each side of the equation. 6.40909091 + -6.40909091 + x = 7.134047106 + -6.40909091 Combine like terms: 6.40909091 + -6.40909091 = 0.00000000 0.00000000 + x = 7.134047106 + -6.40909091 x = 7.134047106 + -6.40909091 Combine like terms: 7.134047106 + -6.40909091 = 0.724956196 x = 0.724956196 Simplifying x = 0.724956196

Subproblem 2

x + 6.40909091 = -7.134047106 Simplifying x + 6.40909091 = -7.134047106 Reorder the terms: 6.40909091 + x = -7.134047106 Solving 6.40909091 + x = -7.134047106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.40909091' to each side of the equation. 6.40909091 + -6.40909091 + x = -7.134047106 + -6.40909091 Combine like terms: 6.40909091 + -6.40909091 = 0.00000000 0.00000000 + x = -7.134047106 + -6.40909091 x = -7.134047106 + -6.40909091 Combine like terms: -7.134047106 + -6.40909091 = -13.543138016 x = -13.543138016 Simplifying x = -13.543138016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.724956196, -13.543138016}

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