12x^2+11x-27=0

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Solution for 12x^2+11x-27=0 equation:


Simplifying
12x2 + 11x + -27 = 0

Reorder the terms:
-27 + 11x + 12x2 = 0

Solving
-27 + 11x + 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'.
-2.25 + 0.9166666667x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 0.9166666667x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 0.9166666667x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 0.9166666667x + x2 = 0 + 2.25
0.9166666667x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
0.9166666667x + x2 = 2.25

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 = 2.25 + 0.2100694445

Reorder the terms:
0.2100694445 + 0.9166666667x + x2 = 2.25 + 0.2100694445

Combine like terms: 2.25 + 0.2100694445 = 2.4600694445
0.2100694445 + 0.9166666667x + x2 = 2.4600694445

Factor a perfect square on the left side:
(x + 0.4583333334)(x + 0.4583333334) = 2.4600694445

Calculate the square root of the right side: 1.568460852

Break this problem into two subproblems by setting 
(x + 0.4583333334) equal to 1.568460852 and -1.568460852.

Subproblem 1

x + 0.4583333334 = 1.568460852 Simplifying x + 0.4583333334 = 1.568460852 Reorder the terms: 0.4583333334 + x = 1.568460852 Solving 0.4583333334 + x = 1.568460852 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 = 1.568460852 + -0.4583333334 Combine like terms: 0.4583333334 + -0.4583333334 = 0.0000000000 0.0000000000 + x = 1.568460852 + -0.4583333334 x = 1.568460852 + -0.4583333334 Combine like terms: 1.568460852 + -0.4583333334 = 1.1101275186 x = 1.1101275186 Simplifying x = 1.1101275186

Subproblem 2

x + 0.4583333334 = -1.568460852 Simplifying x + 0.4583333334 = -1.568460852 Reorder the terms: 0.4583333334 + x = -1.568460852 Solving 0.4583333334 + x = -1.568460852 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 = -1.568460852 + -0.4583333334 Combine like terms: 0.4583333334 + -0.4583333334 = 0.0000000000 0.0000000000 + x = -1.568460852 + -0.4583333334 x = -1.568460852 + -0.4583333334 Combine like terms: -1.568460852 + -0.4583333334 = -2.0267941854 x = -2.0267941854 Simplifying x = -2.0267941854

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1101275186, -2.0267941854}

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