Can x^8+x^4+1 be factored over Q?

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SUMMARY

The polynomial x^8 + x^4 + 1 is irreducible over the field of rational numbers Q. The discussion highlights the application of the Rational Root Theorem, which assists in determining the presence of rational roots in polynomials. It is established that since x^8 + x^4 + 1 does not have any rational roots, it cannot be factored into lower-degree polynomials with rational coefficients.

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Homework Statement



Is x^8+x^4+1 irreducible over Q ?
 
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Any thoughts on this? What have you tried?
 
There's a theorem that deals with rational roots of polynomials that would be useful.
 

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