algebra

x^3 + 4x^2 -9x - 36     we can factor this ( by grouping ) as

x^2 ( x + 4)  - 9(x + 4)   =

(x + 4) ( x^2 - 9) =

(x + 4) ( x + 3) ( x - 3)

So...the second, third and fifth answers are  correct...!!!!!