Groups and FieldsHardGalois Theory ShareGalois Theory · Hard problemGal(Q(ζ7)/Q)≅Z6\operatorname{Gal}(\mathbb Q(\zeta_7)/\mathbb Q)\cong\mathbb Z_6Gal(Q(ζ7)/Q)≅Z6. How many quadratic subfields does Q(ζ7)\mathbb Q(\zeta_7)Q(ζ7) have?Check Show answer Walk through it step by step Practice more like this Review this concept