6b(b-5)-5b=-3

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Solution for 6b(b-5)-5b=-3 equation:


Simplifying
6b(b + -5) + -5b = -3

Reorder the terms:
6b(-5 + b) + -5b = -3
(-5 * 6b + b * 6b) + -5b = -3
(-30b + 6b2) + -5b = -3

Reorder the terms:
-30b + -5b + 6b2 = -3

Combine like terms: -30b + -5b = -35b
-35b + 6b2 = -3

Solving
-35b + 6b2 = -3

Solving for variable 'b'.

Reorder the terms:
3 + -35b + 6b2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + -35b + 6b2 = 0

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

Divide each side by '6'.
0.5 + -5.833333333b + b2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -5.833333333b + -0.5 + b2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + -5.833333333b + b2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -5.833333333b + b2 = 0 + -0.5
-5.833333333b + b2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
-5.833333333b + b2 = -0.5

The b term is -5.833333333b.  Take half its coefficient (-2.916666667).
Square it (8.506944446) and add it to both sides.

Add '8.506944446' to each side of the equation.
-5.833333333b + 8.506944446 + b2 = -0.5 + 8.506944446

Reorder the terms:
8.506944446 + -5.833333333b + b2 = -0.5 + 8.506944446

Combine like terms: -0.5 + 8.506944446 = 8.006944446
8.506944446 + -5.833333333b + b2 = 8.006944446

Factor a perfect square on the left side:
(b + -2.916666667)(b + -2.916666667) = 8.006944446

Calculate the square root of the right side: 2.829654475

Break this problem into two subproblems by setting 
(b + -2.916666667) equal to 2.829654475 and -2.829654475.

Subproblem 1

b + -2.916666667 = 2.829654475 Simplifying b + -2.916666667 = 2.829654475 Reorder the terms: -2.916666667 + b = 2.829654475 Solving -2.916666667 + b = 2.829654475 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2.916666667' to each side of the equation. -2.916666667 + 2.916666667 + b = 2.829654475 + 2.916666667 Combine like terms: -2.916666667 + 2.916666667 = 0.000000000 0.000000000 + b = 2.829654475 + 2.916666667 b = 2.829654475 + 2.916666667 Combine like terms: 2.829654475 + 2.916666667 = 5.746321142 b = 5.746321142 Simplifying b = 5.746321142

Subproblem 2

b + -2.916666667 = -2.829654475 Simplifying b + -2.916666667 = -2.829654475 Reorder the terms: -2.916666667 + b = -2.829654475 Solving -2.916666667 + b = -2.829654475 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2.916666667' to each side of the equation. -2.916666667 + 2.916666667 + b = -2.829654475 + 2.916666667 Combine like terms: -2.916666667 + 2.916666667 = 0.000000000 0.000000000 + b = -2.829654475 + 2.916666667 b = -2.829654475 + 2.916666667 Combine like terms: -2.829654475 + 2.916666667 = 0.087012192 b = 0.087012192 Simplifying b = 0.087012192

Solution

The solution to the problem is based on the solutions from the subproblems. b = {5.746321142, 0.087012192}

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