9x^2+33x+11=0

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Solution for 9x^2+33x+11=0 equation:


Simplifying
9x2 + 33x + 11 = 0

Reorder the terms:
11 + 33x + 9x2 = 0

Solving
11 + 33x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
1.222222222 + 3.666666667x + x2 = 0

Move the constant term to the right:

Add '-1.222222222' to each side of the equation.
1.222222222 + 3.666666667x + -1.222222222 + x2 = 0 + -1.222222222

Reorder the terms:
1.222222222 + -1.222222222 + 3.666666667x + x2 = 0 + -1.222222222

Combine like terms: 1.222222222 + -1.222222222 = 0.000000000
0.000000000 + 3.666666667x + x2 = 0 + -1.222222222
3.666666667x + x2 = 0 + -1.222222222

Combine like terms: 0 + -1.222222222 = -1.222222222
3.666666667x + x2 = -1.222222222

The x term is 3.666666667x.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667x + 3.361111114 + x2 = -1.222222222 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667x + x2 = -1.222222222 + 3.361111114

Combine like terms: -1.222222222 + 3.361111114 = 2.138888892
3.361111114 + 3.666666667x + x2 = 2.138888892

Factor a perfect square on the left side:
(x + 1.833333334)(x + 1.833333334) = 2.138888892

Calculate the square root of the right side: 1.462494066

Break this problem into two subproblems by setting 
(x + 1.833333334) equal to 1.462494066 and -1.462494066.

Subproblem 1

x + 1.833333334 = 1.462494066 Simplifying x + 1.833333334 = 1.462494066 Reorder the terms: 1.833333334 + x = 1.462494066 Solving 1.833333334 + x = 1.462494066 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = 1.462494066 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = 1.462494066 + -1.833333334 x = 1.462494066 + -1.833333334 Combine like terms: 1.462494066 + -1.833333334 = -0.370839268 x = -0.370839268 Simplifying x = -0.370839268

Subproblem 2

x + 1.833333334 = -1.462494066 Simplifying x + 1.833333334 = -1.462494066 Reorder the terms: 1.833333334 + x = -1.462494066 Solving 1.833333334 + x = -1.462494066 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = -1.462494066 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = -1.462494066 + -1.833333334 x = -1.462494066 + -1.833333334 Combine like terms: -1.462494066 + -1.833333334 = -3.2958274 x = -3.2958274 Simplifying x = -3.2958274

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.370839268, -3.2958274}

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