# $\mathbb{Z}_{11} [x]/\langle x^2-2\rangle$ and $\mathbb{Z}_{11} [x]/\langle x^2-3\rangle$ are not isomorphic

I'm sory, I posted another problem. Show that $\mathbb{Z}_{11} [x]/\langle x^2-2\rangle$ and $\mathbb{Z}_{11} [x]/\langle x^2-3\rangle$ are not isomorphic

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You don't have to be sorry, but please don't use the imperative "show" either. How far do you get yourself on this problem? Where are you stuck? –  Gregor Bruns Nov 19 '12 at 12:58
Again, please read the FAQ and follow the rules of the site. meta.math.stackexchange.com/questions/1803/… –  Noah Snyder Nov 19 '12 at 22:35

1. $x^2 - 2$ has no solutions over the field of $11$ elements, while $x^2 - 3$ has a solution (namely $x = 5$).