9b^2+27b+2=0

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Solution for 9b^2+27b+2=0 equation:


Simplifying
9b2 + 27b + 2 = 0

Reorder the terms:
2 + 27b + 9b2 = 0

Solving
2 + 27b + 9b2 = 0

Solving for variable 'b'.

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

Divide each side by '9'.
0.2222222222 + 3b + b2 = 0

Move the constant term to the right:

Add '-0.2222222222' to each side of the equation.
0.2222222222 + 3b + -0.2222222222 + b2 = 0 + -0.2222222222

Reorder the terms:
0.2222222222 + -0.2222222222 + 3b + b2 = 0 + -0.2222222222

Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000
0.0000000000 + 3b + b2 = 0 + -0.2222222222
3b + b2 = 0 + -0.2222222222

Combine like terms: 0 + -0.2222222222 = -0.2222222222
3b + b2 = -0.2222222222

The b term is 3b.  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.
3b + 2.25 + b2 = -0.2222222222 + 2.25

Reorder the terms:
2.25 + 3b + b2 = -0.2222222222 + 2.25

Combine like terms: -0.2222222222 + 2.25 = 2.0277777778
2.25 + 3b + b2 = 2.0277777778

Factor a perfect square on the left side:
(b + 1.5)(b + 1.5) = 2.0277777778

Calculate the square root of the right side: 1.424000624

Break this problem into two subproblems by setting 
(b + 1.5) equal to 1.424000624 and -1.424000624.

Subproblem 1

b + 1.5 = 1.424000624 Simplifying b + 1.5 = 1.424000624 Reorder the terms: 1.5 + b = 1.424000624 Solving 1.5 + b = 1.424000624 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + b = 1.424000624 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = 1.424000624 + -1.5 b = 1.424000624 + -1.5 Combine like terms: 1.424000624 + -1.5 = -0.075999376 b = -0.075999376 Simplifying b = -0.075999376

Subproblem 2

b + 1.5 = -1.424000624 Simplifying b + 1.5 = -1.424000624 Reorder the terms: 1.5 + b = -1.424000624 Solving 1.5 + b = -1.424000624 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + b = -1.424000624 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = -1.424000624 + -1.5 b = -1.424000624 + -1.5 Combine like terms: -1.424000624 + -1.5 = -2.924000624 b = -2.924000624 Simplifying b = -2.924000624

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-0.075999376, -2.924000624}

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