3b^2+12b+1=3

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Solution for 3b^2+12b+1=3 equation:


Simplifying
3b2 + 12b + 1 = 3

Reorder the terms:
1 + 12b + 3b2 = 3

Solving
1 + 12b + 3b2 = 3

Solving for variable 'b'.

Reorder the terms:
1 + -3 + 12b + 3b2 = 3 + -3

Combine like terms: 1 + -3 = -2
-2 + 12b + 3b2 = 3 + -3

Combine like terms: 3 + -3 = 0
-2 + 12b + 3b2 = 0

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

Divide each side by '3'.
-0.6666666667 + 4b + b2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 4b + 0.6666666667 + b2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 4b + b2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 4b + b2 = 0 + 0.6666666667
4b + b2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
4b + b2 = 0.6666666667

The b term is 4b.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4b + 4 + b2 = 0.6666666667 + 4

Reorder the terms:
4 + 4b + b2 = 0.6666666667 + 4

Combine like terms: 0.6666666667 + 4 = 4.6666666667
4 + 4b + b2 = 4.6666666667

Factor a perfect square on the left side:
(b + 2)(b + 2) = 4.6666666667

Calculate the square root of the right side: 2.160246899

Break this problem into two subproblems by setting 
(b + 2) equal to 2.160246899 and -2.160246899.

Subproblem 1

b + 2 = 2.160246899 Simplifying b + 2 = 2.160246899 Reorder the terms: 2 + b = 2.160246899 Solving 2 + b = 2.160246899 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + b = 2.160246899 + -2 Combine like terms: 2 + -2 = 0 0 + b = 2.160246899 + -2 b = 2.160246899 + -2 Combine like terms: 2.160246899 + -2 = 0.160246899 b = 0.160246899 Simplifying b = 0.160246899

Subproblem 2

b + 2 = -2.160246899 Simplifying b + 2 = -2.160246899 Reorder the terms: 2 + b = -2.160246899 Solving 2 + b = -2.160246899 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + b = -2.160246899 + -2 Combine like terms: 2 + -2 = 0 0 + b = -2.160246899 + -2 b = -2.160246899 + -2 Combine like terms: -2.160246899 + -2 = -4.160246899 b = -4.160246899 Simplifying b = -4.160246899

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.160246899, -4.160246899}

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