6b^2+18b+11=

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Solution for 6b^2+18b+11= equation:


Simplifying
6b2 + 18b + 11 = 0

Reorder the terms:
11 + 18b + 6b2 = 0

Solving
11 + 18b + 6b2 = 0

Solving for variable 'b'.

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

Divide each side by '6'.
1.833333333 + 3b + b2 = 0

Move the constant term to the right:

Add '-1.833333333' to each side of the equation.
1.833333333 + 3b + -1.833333333 + b2 = 0 + -1.833333333

Reorder the terms:
1.833333333 + -1.833333333 + 3b + b2 = 0 + -1.833333333

Combine like terms: 1.833333333 + -1.833333333 = 0.000000000
0.000000000 + 3b + b2 = 0 + -1.833333333
3b + b2 = 0 + -1.833333333

Combine like terms: 0 + -1.833333333 = -1.833333333
3b + b2 = -1.833333333

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 = -1.833333333 + 2.25

Reorder the terms:
2.25 + 3b + b2 = -1.833333333 + 2.25

Combine like terms: -1.833333333 + 2.25 = 0.416666667
2.25 + 3b + b2 = 0.416666667

Factor a perfect square on the left side:
(b + 1.5)(b + 1.5) = 0.416666667

Calculate the square root of the right side: 0.645497225

Break this problem into two subproblems by setting 
(b + 1.5) equal to 0.645497225 and -0.645497225.

Subproblem 1

b + 1.5 = 0.645497225 Simplifying b + 1.5 = 0.645497225 Reorder the terms: 1.5 + b = 0.645497225 Solving 1.5 + b = 0.645497225 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 = 0.645497225 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = 0.645497225 + -1.5 b = 0.645497225 + -1.5 Combine like terms: 0.645497225 + -1.5 = -0.854502775 b = -0.854502775 Simplifying b = -0.854502775

Subproblem 2

b + 1.5 = -0.645497225 Simplifying b + 1.5 = -0.645497225 Reorder the terms: 1.5 + b = -0.645497225 Solving 1.5 + b = -0.645497225 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 = -0.645497225 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = -0.645497225 + -1.5 b = -0.645497225 + -1.5 Combine like terms: -0.645497225 + -1.5 = -2.145497225 b = -2.145497225 Simplifying b = -2.145497225

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-0.854502775, -2.145497225}

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