SOLUTION: What are the factors of t^4-81?

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Question 174854: What are the factors of t^4-81?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
t^4-81 = (t^2 - 9)*(t^2 + 9)
=(t-3)*(t+3)*(t^2+9)