In: Advanced Math
Determine whether the polynomial is reducible or irreducible in the given polynomial ring. Justify your answers.
(c) x^4 + 1 in Z5[x]
(e) 2x^3 − 5x^2 + 6x − 2 in Z[x]
(f) x^4 + 4x^3 + 6x^2 + 2x + 1 in Z[x]. Hint: Substitute x − 1 for x.