Q: Show that every nonzero element of Zn is a unit or a zero-divisor.
A: We know that Zp (p prime) is an integral domain and thus has no zero-divsiors.
We also know that for Zn where (n <> p prime) then Zn is not an integral domain.
I might actually need some help with this.
--Bakey 11:34, 6 December 2012 (UTC)
