Ultrafilter! Waffle! (ultrawaffle) wrote,
  • Mood: lonely

FLMPotD

Show that x^4-16x^2+4 is reducible mod p for every prime p.

(Stolen from a comment by secret_panda on a post on somthng2remembr's facebook. Yay stalking!)

(PS: Actually, my argument should work for anything of the form x^4+bx^2+c^2 for b and c integers and p odd.)
Tags: flmpotd
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