Question

Which of the following are the factors of t^4 – 81?
A. (t^2 – 9)(t^2 – 9) C. (t – 3)(t + 3)2
B. (t – 3)2(t + 3)2 D. (t – 3)(t + 3)(t^2 + 9)

Answer 1

D

Answer 2

@finishingschool (nice pun) do you need method or answers? if you just need the answers you can do this
http://www.wolframalpha.com/input/?i=factor+t^4+%E2%80%93+81

Answer 3

D is right sure