11x^2+33x+12=0

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Solution for 11x^2+33x+12=0 equation:


Simplifying
11x2 + 33x + 12 = 0

Reorder the terms:
12 + 33x + 11x2 = 0

Solving
12 + 33x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
1.090909091 + 3x + x2 = 0

Move the constant term to the right:

Add '-1.090909091' to each side of the equation.
1.090909091 + 3x + -1.090909091 + x2 = 0 + -1.090909091

Reorder the terms:
1.090909091 + -1.090909091 + 3x + x2 = 0 + -1.090909091

Combine like terms: 1.090909091 + -1.090909091 = 0.000000000
0.000000000 + 3x + x2 = 0 + -1.090909091
3x + x2 = 0 + -1.090909091

Combine like terms: 0 + -1.090909091 = -1.090909091
3x + x2 = -1.090909091

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = -1.090909091 + 2.25

Reorder the terms:
2.25 + 3x + x2 = -1.090909091 + 2.25

Combine like terms: -1.090909091 + 2.25 = 1.159090909
2.25 + 3x + x2 = 1.159090909

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 1.159090909

Calculate the square root of the right side: 1.076610844

Break this problem into two subproblems by setting 
(x + 1.5) equal to 1.076610844 and -1.076610844.

Subproblem 1

x + 1.5 = 1.076610844 Simplifying x + 1.5 = 1.076610844 Reorder the terms: 1.5 + x = 1.076610844 Solving 1.5 + x = 1.076610844 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 1.076610844 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 1.076610844 + -1.5 x = 1.076610844 + -1.5 Combine like terms: 1.076610844 + -1.5 = -0.423389156 x = -0.423389156 Simplifying x = -0.423389156

Subproblem 2

x + 1.5 = -1.076610844 Simplifying x + 1.5 = -1.076610844 Reorder the terms: 1.5 + x = -1.076610844 Solving 1.5 + x = -1.076610844 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -1.076610844 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -1.076610844 + -1.5 x = -1.076610844 + -1.5 Combine like terms: -1.076610844 + -1.5 = -2.576610844 x = -2.576610844 Simplifying x = -2.576610844

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.423389156, -2.576610844}

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