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Descompuneri in factori a^8+a^4+1

Răspuns :

a^8+a^4+1 =a^8+2a^4+1-a^4=(a^4+1)²-a^4= (a^4+1-a²)(a^4+1+a²)=
(a^4-a²+1)(a^4+a²+1)