<s>[INST] How to factor $(x^5+1) (x^5-1) $ I have this:
$ (x^5+1) (x^5-1) $
And I don't know how to continue factor.
Geogebra's Factor says:
$(x+1)(x-1)(x^4-x^3+x^2-x+1)(x^4+x^3+x^2+x+1)$
 [/INST] Hint:
$$x^n-1=(x - 1)[x^{n - 1} + x^{n - 2} + ... + x^2 + x + 1] $$
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