The given equation is .

Add 72 on each side.

Factors of : .

Group the terms with common factors.

 Factors of : .

Factors of : .

Factors of : .

Take out common term .

Take out common term 12.

Take out common term .

Apply zero product property: If ab = 0 then a = 0 or b = 0.

   or  

           or   

            or   

The factors of the given equation is 6.