b=5b^2-19b+12

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Solution for b=5b^2-19b+12 equation:


Simplifying
b = 5b2 + -19b + 12

Reorder the terms:
b = 12 + -19b + 5b2

Solving
b = 12 + -19b + 5b2

Solving for variable 'b'.

Reorder the terms:
-12 + b + 19b + -5b2 = 12 + -19b + 5b2 + -12 + 19b + -5b2

Combine like terms: b + 19b = 20b
-12 + 20b + -5b2 = 12 + -19b + 5b2 + -12 + 19b + -5b2

Reorder the terms:
-12 + 20b + -5b2 = 12 + -12 + -19b + 19b + 5b2 + -5b2

Combine like terms: 12 + -12 = 0
-12 + 20b + -5b2 = 0 + -19b + 19b + 5b2 + -5b2
-12 + 20b + -5b2 = -19b + 19b + 5b2 + -5b2

Combine like terms: -19b + 19b = 0
-12 + 20b + -5b2 = 0 + 5b2 + -5b2
-12 + 20b + -5b2 = 5b2 + -5b2

Combine like terms: 5b2 + -5b2 = 0
-12 + 20b + -5b2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
2.4 + -4b + b2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + -4b + -2.4 + b2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + -4b + b2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + -4b + b2 = 0 + -2.4
-4b + b2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
-4b + b2 = -2.4

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 = -2.4 + 4

Reorder the terms:
4 + -4b + b2 = -2.4 + 4

Combine like terms: -2.4 + 4 = 1.6
4 + -4b + b2 = 1.6

Factor a perfect square on the left side:
(b + -2)(b + -2) = 1.6

Calculate the square root of the right side: 1.264911064

Break this problem into two subproblems by setting 
(b + -2) equal to 1.264911064 and -1.264911064.

Subproblem 1

b + -2 = 1.264911064 Simplifying b + -2 = 1.264911064 Reorder the terms: -2 + b = 1.264911064 Solving -2 + b = 1.264911064 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 = 1.264911064 + 2 Combine like terms: -2 + 2 = 0 0 + b = 1.264911064 + 2 b = 1.264911064 + 2 Combine like terms: 1.264911064 + 2 = 3.264911064 b = 3.264911064 Simplifying b = 3.264911064

Subproblem 2

b + -2 = -1.264911064 Simplifying b + -2 = -1.264911064 Reorder the terms: -2 + b = -1.264911064 Solving -2 + b = -1.264911064 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 = -1.264911064 + 2 Combine like terms: -2 + 2 = 0 0 + b = -1.264911064 + 2 b = -1.264911064 + 2 Combine like terms: -1.264911064 + 2 = 0.735088936 b = 0.735088936 Simplifying b = 0.735088936

Solution

The solution to the problem is based on the solutions from the subproblems. b = {3.264911064, 0.735088936}

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