Question

3n^2-n/n^2-1 divided by n^2/n+1

Answer 1

Refer to the attachment.

Answer 2

step by step :

3n^2 -n = n(3n-1)
n^2 -1 = (n-1)(n+1)

hope you know again that

a
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b a d
---- = --- * ----
c b c
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d

hope so much that theses will help you