12x^2-12x-1=0

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


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

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

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

Move the constant term to the right:

Add '0.08333333333' to each side of the equation.
-0.08333333333 + -1x + 0.08333333333 + x2 = 0 + 0.08333333333

Reorder the terms:
-0.08333333333 + 0.08333333333 + -1x + x2 = 0 + 0.08333333333

Combine like terms: -0.08333333333 + 0.08333333333 = 0.00000000000
0.00000000000 + -1x + x2 = 0 + 0.08333333333
-1x + x2 = 0 + 0.08333333333

Combine like terms: 0 + 0.08333333333 = 0.08333333333
-1x + x2 = 0.08333333333

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 = 0.08333333333 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.08333333333 + 0.25

Combine like terms: 0.08333333333 + 0.25 = 0.33333333333
0.25 + -1x + x2 = 0.33333333333

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.33333333333

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.577350269 and -0.577350269.

Subproblem 1

x + -0.5 = 0.577350269 Simplifying x + -0.5 = 0.577350269 Reorder the terms: -0.5 + x = 0.577350269 Solving -0.5 + x = 0.577350269 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 = 0.577350269 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.577350269 + 0.5 x = 0.577350269 + 0.5 Combine like terms: 0.577350269 + 0.5 = 1.077350269 x = 1.077350269 Simplifying x = 1.077350269

Subproblem 2

x + -0.5 = -0.577350269 Simplifying x + -0.5 = -0.577350269 Reorder the terms: -0.5 + x = -0.577350269 Solving -0.5 + x = -0.577350269 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 = -0.577350269 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.577350269 + 0.5 x = -0.577350269 + 0.5 Combine like terms: -0.577350269 + 0.5 = -0.077350269 x = -0.077350269 Simplifying x = -0.077350269

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.077350269, -0.077350269}

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