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Investigate if f is irreducible in and : i) ii) Thanks!!!

Quote: Originally Posted by roporte i) ii) Irreducibility in Z and Q are equivalent by Gauss' lemma. Now in (i) let p=3 then p divides -6,9,-15 by p^2 does not divide -15 and so it is irreducible. In (ii) let p=2 then p divides 6 and 6 but p^2 does not divide 6.