12x^2-4x=11

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Solution for 12x^2-4x=11 equation:


Simplifying
12x2 + -4x = 11

Reorder the terms:
-4x + 12x2 = 11

Solving
-4x + 12x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + -4x + 12x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + -4x + 12x2 = 0

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

Divide each side by '12'.
-0.9166666667 + -0.3333333333x + x2 = 0

Move the constant term to the right:

Add '0.9166666667' to each side of the equation.
-0.9166666667 + -0.3333333333x + 0.9166666667 + x2 = 0 + 0.9166666667

Reorder the terms:
-0.9166666667 + 0.9166666667 + -0.3333333333x + x2 = 0 + 0.9166666667

Combine like terms: -0.9166666667 + 0.9166666667 = 0.0000000000
0.0000000000 + -0.3333333333x + x2 = 0 + 0.9166666667
-0.3333333333x + x2 = 0 + 0.9166666667

Combine like terms: 0 + 0.9166666667 = 0.9166666667
-0.3333333333x + x2 = 0.9166666667

The x term is -0.3333333333x.  Take half its coefficient (-0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
-0.3333333333x + 0.02777777779 + x2 = 0.9166666667 + 0.02777777779

Reorder the terms:
0.02777777779 + -0.3333333333x + x2 = 0.9166666667 + 0.02777777779

Combine like terms: 0.9166666667 + 0.02777777779 = 0.94444444449
0.02777777779 + -0.3333333333x + x2 = 0.94444444449

Factor a perfect square on the left side:
(x + -0.1666666667)(x + -0.1666666667) = 0.94444444449

Calculate the square root of the right side: 0.971825316

Break this problem into two subproblems by setting 
(x + -0.1666666667) equal to 0.971825316 and -0.971825316.

Subproblem 1

x + -0.1666666667 = 0.971825316 Simplifying x + -0.1666666667 = 0.971825316 Reorder the terms: -0.1666666667 + x = 0.971825316 Solving -0.1666666667 + x = 0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = 0.971825316 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = 0.971825316 + 0.1666666667 x = 0.971825316 + 0.1666666667 Combine like terms: 0.971825316 + 0.1666666667 = 1.1384919827 x = 1.1384919827 Simplifying x = 1.1384919827

Subproblem 2

x + -0.1666666667 = -0.971825316 Simplifying x + -0.1666666667 = -0.971825316 Reorder the terms: -0.1666666667 + x = -0.971825316 Solving -0.1666666667 + x = -0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = -0.971825316 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = -0.971825316 + 0.1666666667 x = -0.971825316 + 0.1666666667 Combine like terms: -0.971825316 + 0.1666666667 = -0.8051586493 x = -0.8051586493 Simplifying x = -0.8051586493

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1384919827, -0.8051586493}

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