To find the Galois group for quartic polynomial over Q, you need first to find the resolvent cubic of f(x) and its discriminant.
If the resolvent cubic of f(x) splits completely, then its Galois group is .
To find the Galois group for quartic polynomial over Q, you need first to find the resolvent cubic of f(x) and its discriminant.
If the resolvent cubic of f(x) splits completely, then its Galois group is .