Answer:
As I understand it (x+6) has just one factor
yes it's true that x is the same as 1x
but i think you should follow the same as prime descomposition I mean
(x-6) is the same as 1*(x-6) is the same as 1*1*(x+6) is the same as 1*1*1*(x+6) is the same as.... I think you get the idea