SOLUTION: How do you completly factor p^4 - 1, what is the answer?

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Question 150645: How do you completly factor p^4 - 1, what is the answer?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
difference of squares __ (p^2+1)(p^2-1)

difference of squares (again) __ (p^2+1)(p+1)(p-1)