144=b^2-12b

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Solution for 144=b^2-12b equation:


Simplifying
144 = b2 + -12b

Reorder the terms:
144 = -12b + b2

Solving
144 = -12b + b2

Solving for variable 'b'.

Reorder the terms:
144 + 12b + -1b2 = -12b + 12b + b2 + -1b2

Combine like terms: -12b + 12b = 0
144 + 12b + -1b2 = 0 + b2 + -1b2
144 + 12b + -1b2 = b2 + -1b2

Combine like terms: b2 + -1b2 = 0
144 + 12b + -1b2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-144 + -12b + b2 = 0

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + -12b + 144 + b2 = 0 + 144

Reorder the terms:
-144 + 144 + -12b + b2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + -12b + b2 = 0 + 144
-12b + b2 = 0 + 144

Combine like terms: 0 + 144 = 144
-12b + b2 = 144

The b term is -12b.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12b + 36 + b2 = 144 + 36

Reorder the terms:
36 + -12b + b2 = 144 + 36

Combine like terms: 144 + 36 = 180
36 + -12b + b2 = 180

Factor a perfect square on the left side:
(b + -6)(b + -6) = 180

Calculate the square root of the right side: 13.416407865

Break this problem into two subproblems by setting 
(b + -6) equal to 13.416407865 and -13.416407865.

Subproblem 1

b + -6 = 13.416407865 Simplifying b + -6 = 13.416407865 Reorder the terms: -6 + b = 13.416407865 Solving -6 + b = 13.416407865 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + b = 13.416407865 + 6 Combine like terms: -6 + 6 = 0 0 + b = 13.416407865 + 6 b = 13.416407865 + 6 Combine like terms: 13.416407865 + 6 = 19.416407865 b = 19.416407865 Simplifying b = 19.416407865

Subproblem 2

b + -6 = -13.416407865 Simplifying b + -6 = -13.416407865 Reorder the terms: -6 + b = -13.416407865 Solving -6 + b = -13.416407865 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + b = -13.416407865 + 6 Combine like terms: -6 + 6 = 0 0 + b = -13.416407865 + 6 b = -13.416407865 + 6 Combine like terms: -13.416407865 + 6 = -7.416407865 b = -7.416407865 Simplifying b = -7.416407865

Solution

The solution to the problem is based on the solutions from the subproblems. b = {19.416407865, -7.416407865}

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