9x^2+23x+11=0

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Solution for 9x^2+23x+11=0 equation:


Simplifying
9x2 + 23x + 11 = 0

Reorder the terms:
11 + 23x + 9x2 = 0

Solving
11 + 23x + 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 + 2.555555556x + x2 = 0

Move the constant term to the right:

Add '-1.222222222' to each side of the equation.
1.222222222 + 2.555555556x + -1.222222222 + x2 = 0 + -1.222222222

Reorder the terms:
1.222222222 + -1.222222222 + 2.555555556x + x2 = 0 + -1.222222222

Combine like terms: 1.222222222 + -1.222222222 = 0.000000000
0.000000000 + 2.555555556x + x2 = 0 + -1.222222222
2.555555556x + x2 = 0 + -1.222222222

Combine like terms: 0 + -1.222222222 = -1.222222222
2.555555556x + x2 = -1.222222222

The x term is 2.555555556x.  Take half its coefficient (1.277777778).
Square it (1.632716050) and add it to both sides.

Add '1.632716050' to each side of the equation.
2.555555556x + 1.632716050 + x2 = -1.222222222 + 1.632716050

Reorder the terms:
1.632716050 + 2.555555556x + x2 = -1.222222222 + 1.632716050

Combine like terms: -1.222222222 + 1.632716050 = 0.410493828
1.632716050 + 2.555555556x + x2 = 0.410493828

Factor a perfect square on the left side:
(x + 1.277777778)(x + 1.277777778) = 0.410493828

Calculate the square root of the right side: 0.640697923

Break this problem into two subproblems by setting 
(x + 1.277777778) equal to 0.640697923 and -0.640697923.

Subproblem 1

x + 1.277777778 = 0.640697923 Simplifying x + 1.277777778 = 0.640697923 Reorder the terms: 1.277777778 + x = 0.640697923 Solving 1.277777778 + x = 0.640697923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = 0.640697923 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = 0.640697923 + -1.277777778 x = 0.640697923 + -1.277777778 Combine like terms: 0.640697923 + -1.277777778 = -0.637079855 x = -0.637079855 Simplifying x = -0.637079855

Subproblem 2

x + 1.277777778 = -0.640697923 Simplifying x + 1.277777778 = -0.640697923 Reorder the terms: 1.277777778 + x = -0.640697923 Solving 1.277777778 + x = -0.640697923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = -0.640697923 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = -0.640697923 + -1.277777778 x = -0.640697923 + -1.277777778 Combine like terms: -0.640697923 + -1.277777778 = -1.918475701 x = -1.918475701 Simplifying x = -1.918475701

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.637079855, -1.918475701}

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