54x^2-54x-7.18=0

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Solution for 54x^2-54x-7.18=0 equation:


Simplifying
54x2 + -54x + -7.18 = 0

Reorder the terms:
-7.18 + -54x + 54x2 = 0

Solving
-7.18 + -54x + 54x2 = 0

Solving for variable 'x'.

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

Divide each side by '54'.
-0.132962963 + -1x + x2 = 0

Move the constant term to the right:

Add '0.132962963' to each side of the equation.
-0.132962963 + -1x + 0.132962963 + x2 = 0 + 0.132962963

Reorder the terms:
-0.132962963 + 0.132962963 + -1x + x2 = 0 + 0.132962963

Combine like terms: -0.132962963 + 0.132962963 = 0.000000000
0.000000000 + -1x + x2 = 0 + 0.132962963
-1x + x2 = 0 + 0.132962963

Combine like terms: 0 + 0.132962963 = 0.132962963
-1x + x2 = 0.132962963

The x term is -1x.  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.
-1x + 0.25 + x2 = 0.132962963 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.132962963 + 0.25

Combine like terms: 0.132962963 + 0.25 = 0.382962963
0.25 + -1x + x2 = 0.382962963

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.382962963

Calculate the square root of the right side: 0.618840014

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.618840014 and -0.618840014.

Subproblem 1

x + -0.5 = 0.618840014 Simplifying x + -0.5 = 0.618840014 Reorder the terms: -0.5 + x = 0.618840014 Solving -0.5 + x = 0.618840014 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 = 0.618840014 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.618840014 + 0.5 x = 0.618840014 + 0.5 Combine like terms: 0.618840014 + 0.5 = 1.118840014 x = 1.118840014 Simplifying x = 1.118840014

Subproblem 2

x + -0.5 = -0.618840014 Simplifying x + -0.5 = -0.618840014 Reorder the terms: -0.5 + x = -0.618840014 Solving -0.5 + x = -0.618840014 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 = -0.618840014 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.618840014 + 0.5 x = -0.618840014 + 0.5 Combine like terms: -0.618840014 + 0.5 = -0.118840014 x = -0.118840014 Simplifying x = -0.118840014

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.118840014, -0.118840014}

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