36x^2-4x-1=0

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Solution for 36x^2-4x-1=0 equation:


Simplifying
36x2 + -4x + -1 = 0

Reorder the terms:
-1 + -4x + 36x2 = 0

Solving
-1 + -4x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-0.02777777778 + -0.1111111111x + x2 = 0

Move the constant term to the right:

Add '0.02777777778' to each side of the equation.
-0.02777777778 + -0.1111111111x + 0.02777777778 + x2 = 0 + 0.02777777778

Reorder the terms:
-0.02777777778 + 0.02777777778 + -0.1111111111x + x2 = 0 + 0.02777777778

Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000
0.00000000000 + -0.1111111111x + x2 = 0 + 0.02777777778
-0.1111111111x + x2 = 0 + 0.02777777778

Combine like terms: 0 + 0.02777777778 = 0.02777777778
-0.1111111111x + x2 = 0.02777777778

The x term is -0.1111111111x.  Take half its coefficient (-0.05555555555).
Square it (0.003086419752) and add it to both sides.

Add '0.003086419752' to each side of the equation.
-0.1111111111x + 0.003086419752 + x2 = 0.02777777778 + 0.003086419752

Reorder the terms:
0.003086419752 + -0.1111111111x + x2 = 0.02777777778 + 0.003086419752

Combine like terms: 0.02777777778 + 0.003086419752 = 0.030864197532
0.003086419752 + -0.1111111111x + x2 = 0.030864197532

Factor a perfect square on the left side:
(x + -0.05555555555)(x + -0.05555555555) = 0.030864197532

Calculate the square root of the right side: 0.175682092

Break this problem into two subproblems by setting 
(x + -0.05555555555) equal to 0.175682092 and -0.175682092.

Subproblem 1

x + -0.05555555555 = 0.175682092 Simplifying x + -0.05555555555 = 0.175682092 Reorder the terms: -0.05555555555 + x = 0.175682092 Solving -0.05555555555 + x = 0.175682092 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05555555555' to each side of the equation. -0.05555555555 + 0.05555555555 + x = 0.175682092 + 0.05555555555 Combine like terms: -0.05555555555 + 0.05555555555 = 0.00000000000 0.00000000000 + x = 0.175682092 + 0.05555555555 x = 0.175682092 + 0.05555555555 Combine like terms: 0.175682092 + 0.05555555555 = 0.23123764755 x = 0.23123764755 Simplifying x = 0.23123764755

Subproblem 2

x + -0.05555555555 = -0.175682092 Simplifying x + -0.05555555555 = -0.175682092 Reorder the terms: -0.05555555555 + x = -0.175682092 Solving -0.05555555555 + x = -0.175682092 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05555555555' to each side of the equation. -0.05555555555 + 0.05555555555 + x = -0.175682092 + 0.05555555555 Combine like terms: -0.05555555555 + 0.05555555555 = 0.00000000000 0.00000000000 + x = -0.175682092 + 0.05555555555 x = -0.175682092 + 0.05555555555 Combine like terms: -0.175682092 + 0.05555555555 = -0.12012653645 x = -0.12012653645 Simplifying x = -0.12012653645

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.23123764755, -0.12012653645}

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