# Math Help - Irreducable ploynomial in Z5

1. ## Irreducable ploynomial in Z5

F= x^3 + 2x + 1 irreducable in Z5 (Z subscript 5)

i have tried EC looking at F(x+1) which doesnt work for me. Cant think of what else to try.

Help much appreciated

2. Originally Posted by Niall101
F= x^3 + 2x + 1 irreducable in Z5 (Z subscript 5)

i have tried EC looking at F(x+1) which doesnt work for me. Cant think of what else to try.

Help much appreciated
Just check if any element in $\mathbb{Z}_5$ solves the polynomial.