11x^2+x-54=0

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Solution for 11x^2+x-54=0 equation:


Simplifying
11x2 + x + -54 = 0

Reorder the terms:
-54 + x + 11x2 = 0

Solving
-54 + x + 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'.
-4.909090909 + 0.09090909091x + x2 = 0

Move the constant term to the right:

Add '4.909090909' to each side of the equation.
-4.909090909 + 0.09090909091x + 4.909090909 + x2 = 0 + 4.909090909

Reorder the terms:
-4.909090909 + 4.909090909 + 0.09090909091x + x2 = 0 + 4.909090909

Combine like terms: -4.909090909 + 4.909090909 = 0.000000000
0.000000000 + 0.09090909091x + x2 = 0 + 4.909090909
0.09090909091x + x2 = 0 + 4.909090909

Combine like terms: 0 + 4.909090909 = 4.909090909
0.09090909091x + x2 = 4.909090909

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.09090909091x + 0.25 + x2 = 4.909090909 + 0.25

Reorder the terms:
0.25 + 0.09090909091x + x2 = 4.909090909 + 0.25

Combine like terms: 4.909090909 + 0.25 = 5.159090909
0.25 + 0.09090909091x + x2 = 5.159090909

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 5.159090909

Calculate the square root of the right side: 2.271363227

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.271363227 and -2.271363227.

Subproblem 1

x + 0.5 = 2.271363227 Simplifying x + 0.5 = 2.271363227 Reorder the terms: 0.5 + x = 2.271363227 Solving 0.5 + x = 2.271363227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 2.271363227 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.271363227 + -0.5 x = 2.271363227 + -0.5 Combine like terms: 2.271363227 + -0.5 = 1.771363227 x = 1.771363227 Simplifying x = 1.771363227

Subproblem 2

x + 0.5 = -2.271363227 Simplifying x + 0.5 = -2.271363227 Reorder the terms: 0.5 + x = -2.271363227 Solving 0.5 + x = -2.271363227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -2.271363227 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.271363227 + -0.5 x = -2.271363227 + -0.5 Combine like terms: -2.271363227 + -0.5 = -2.771363227 x = -2.771363227 Simplifying x = -2.771363227

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.771363227, -2.771363227}

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