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Jan 28 at 11:12 comment added Gerry Myerson It's not true in general that if all the nonzero coefficients of $p(x)$ are $\pm1$ then so are all the nonzero coefficients of its factors.
Jan 28 at 4:20 history edited Michael Hardy CC BY-SA 4.0
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Jan 28 at 1:23 comment added Will Jagy not the same, it always helps to see if roots of unity are roots of your polynomial... both your examples annihilate some c ube and sixth roots of unity
S Jan 28 at 0:20 history suggested J. W. Tanner
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Jan 28 at 0:08 review Suggested edits
S Jan 28 at 0:20
Jan 27 at 21:17 history asked Ivan Borisyuk CC BY-SA 4.0