2b+3b(b-7)=44

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Solution for 2b+3b(b-7)=44 equation:


Simplifying
2b + 3b(b + -7) = 44

Reorder the terms:
2b + 3b(-7 + b) = 44
2b + (-7 * 3b + b * 3b) = 44
2b + (-21b + 3b2) = 44

Combine like terms: 2b + -21b = -19b
-19b + 3b2 = 44

Solving
-19b + 3b2 = 44

Solving for variable 'b'.

Reorder the terms:
-44 + -19b + 3b2 = 44 + -44

Combine like terms: 44 + -44 = 0
-44 + -19b + 3b2 = 0

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

Divide each side by '3'.
-14.66666667 + -6.333333333b + b2 = 0

Move the constant term to the right:

Add '14.66666667' to each side of the equation.
-14.66666667 + -6.333333333b + 14.66666667 + b2 = 0 + 14.66666667

Reorder the terms:
-14.66666667 + 14.66666667 + -6.333333333b + b2 = 0 + 14.66666667

Combine like terms: -14.66666667 + 14.66666667 = 0.00000000
0.00000000 + -6.333333333b + b2 = 0 + 14.66666667
-6.333333333b + b2 = 0 + 14.66666667

Combine like terms: 0 + 14.66666667 = 14.66666667
-6.333333333b + b2 = 14.66666667

The b term is -6.333333333b.  Take half its coefficient (-3.166666667).
Square it (10.02777778) and add it to both sides.

Add '10.02777778' to each side of the equation.
-6.333333333b + 10.02777778 + b2 = 14.66666667 + 10.02777778

Reorder the terms:
10.02777778 + -6.333333333b + b2 = 14.66666667 + 10.02777778

Combine like terms: 14.66666667 + 10.02777778 = 24.69444445
10.02777778 + -6.333333333b + b2 = 24.69444445

Factor a perfect square on the left side:
(b + -3.166666667)(b + -3.166666667) = 24.69444445

Calculate the square root of the right side: 4.969350506

Break this problem into two subproblems by setting 
(b + -3.166666667) equal to 4.969350506 and -4.969350506.

Subproblem 1

b + -3.166666667 = 4.969350506 Simplifying b + -3.166666667 = 4.969350506 Reorder the terms: -3.166666667 + b = 4.969350506 Solving -3.166666667 + b = 4.969350506 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + b = 4.969350506 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + b = 4.969350506 + 3.166666667 b = 4.969350506 + 3.166666667 Combine like terms: 4.969350506 + 3.166666667 = 8.136017173 b = 8.136017173 Simplifying b = 8.136017173

Subproblem 2

b + -3.166666667 = -4.969350506 Simplifying b + -3.166666667 = -4.969350506 Reorder the terms: -3.166666667 + b = -4.969350506 Solving -3.166666667 + b = -4.969350506 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + b = -4.969350506 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + b = -4.969350506 + 3.166666667 b = -4.969350506 + 3.166666667 Combine like terms: -4.969350506 + 3.166666667 = -1.802683839 b = -1.802683839 Simplifying b = -1.802683839

Solution

The solution to the problem is based on the solutions from the subproblems. b = {8.136017173, -1.802683839}

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