12x^2-3x-1=0

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Solution for 12x^2-3x-1=0 equation: 


Simplifying
12x2 + -3x + -1 = 0

Reorder the terms:
-1 + -3x + 12x2 = 0

Solving
-1 + -3x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.08333333333 + -0.25x + x2 = 0

Move the constant term to the right:

Add '0.08333333333' to each side of the equation.
-0.08333333333 + -0.25x + 0.08333333333 + x2 = 0 + 0.08333333333

Reorder the terms:
-0.08333333333 + 0.08333333333 + -0.25x + x2 = 0 + 0.08333333333

Combine like terms: -0.08333333333 + 0.08333333333 = 0.00000000000
0.00000000000 + -0.25x + x2 = 0 + 0.08333333333
-0.25x + x2 = 0 + 0.08333333333

Combine like terms: 0 + 0.08333333333 = 0.08333333333
-0.25x + x2 = 0.08333333333

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = 0.08333333333 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = 0.08333333333 + 0.015625

Combine like terms: 0.08333333333 + 0.015625 = 0.09895833333
0.015625 + -0.25x + x2 = 0.09895833333

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = 0.09895833333

Calculate the square root of the right side: 0.314576435

Break this problem into two subproblems by setting 
(x + -0.125) equal to 0.314576435 and -0.314576435.


Subproblem 1
x + -0.125 = 0.314576435

Simplifying
x + -0.125 = 0.314576435

Reorder the terms:
-0.125 + x = 0.314576435

Solving
-0.125 + x = 0.314576435

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.125' to each side of the equation.
-0.125 + 0.125 + x = 0.314576435 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + x = 0.314576435 + 0.125
x = 0.314576435 + 0.125

Combine like terms: 0.314576435 + 0.125 = 0.439576435
x = 0.439576435

Simplifying
x = 0.439576435


Subproblem 2
x + -0.125 = -0.314576435

Simplifying
x + -0.125 = -0.314576435

Reorder the terms:
-0.125 + x = -0.314576435

Solving
-0.125 + x = -0.314576435

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.125' to each side of the equation.
-0.125 + 0.125 + x = -0.314576435 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + x = -0.314576435 + 0.125
x = -0.314576435 + 0.125

Combine like terms: -0.314576435 + 0.125 = -0.189576435
x = -0.189576435

Simplifying
x = -0.189576435


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.439576435, -0.189576435}

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