12x^2-11x=55

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Solution for 12x^2-11x=55 equation:


Simplifying
12x2 + -11x = 55

Reorder the terms:
-11x + 12x2 = 55

Solving
-11x + 12x2 = 55

Solving for variable 'x'.

Reorder the terms:
-55 + -11x + 12x2 = 55 + -55

Combine like terms: 55 + -55 = 0
-55 + -11x + 12x2 = 0

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

Divide each side by '12'.
-4.583333333 + -0.9166666667x + x2 = 0

Move the constant term to the right:

Add '4.583333333' to each side of the equation.
-4.583333333 + -0.9166666667x + 4.583333333 + x2 = 0 + 4.583333333

Reorder the terms:
-4.583333333 + 4.583333333 + -0.9166666667x + x2 = 0 + 4.583333333

Combine like terms: -4.583333333 + 4.583333333 = 0.000000000
0.000000000 + -0.9166666667x + x2 = 0 + 4.583333333
-0.9166666667x + x2 = 0 + 4.583333333

Combine like terms: 0 + 4.583333333 = 4.583333333
-0.9166666667x + x2 = 4.583333333

The x term is -0.9166666667x.  Take half its coefficient (-0.4583333334).
Square it (0.2100694445) and add it to both sides.

Add '0.2100694445' to each side of the equation.
-0.9166666667x + 0.2100694445 + x2 = 4.583333333 + 0.2100694445

Reorder the terms:
0.2100694445 + -0.9166666667x + x2 = 4.583333333 + 0.2100694445

Combine like terms: 4.583333333 + 0.2100694445 = 4.7934027775
0.2100694445 + -0.9166666667x + x2 = 4.7934027775

Factor a perfect square on the left side:
(x + -0.4583333334)(x + -0.4583333334) = 4.7934027775

Calculate the square root of the right side: 2.189384109

Break this problem into two subproblems by setting 
(x + -0.4583333334) equal to 2.189384109 and -2.189384109.

Subproblem 1

x + -0.4583333334 = 2.189384109 Simplifying x + -0.4583333334 = 2.189384109 Reorder the terms: -0.4583333334 + x = 2.189384109 Solving -0.4583333334 + x = 2.189384109 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4583333334' to each side of the equation. -0.4583333334 + 0.4583333334 + x = 2.189384109 + 0.4583333334 Combine like terms: -0.4583333334 + 0.4583333334 = 0.0000000000 0.0000000000 + x = 2.189384109 + 0.4583333334 x = 2.189384109 + 0.4583333334 Combine like terms: 2.189384109 + 0.4583333334 = 2.6477174424 x = 2.6477174424 Simplifying x = 2.6477174424

Subproblem 2

x + -0.4583333334 = -2.189384109 Simplifying x + -0.4583333334 = -2.189384109 Reorder the terms: -0.4583333334 + x = -2.189384109 Solving -0.4583333334 + x = -2.189384109 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4583333334' to each side of the equation. -0.4583333334 + 0.4583333334 + x = -2.189384109 + 0.4583333334 Combine like terms: -0.4583333334 + 0.4583333334 = 0.0000000000 0.0000000000 + x = -2.189384109 + 0.4583333334 x = -2.189384109 + 0.4583333334 Combine like terms: -2.189384109 + 0.4583333334 = -1.7310507756 x = -1.7310507756 Simplifying x = -1.7310507756

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.6477174424, -1.7310507756}

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