What are some subfields, $F$ (besides $\mathbb{R}$), with $F\subset \mathbb{C}$ such that $\mathbb{C}/F$ has degree 2? How can I show there are infinitely many? Can I explicitly construct some of them?
2026-03-29 08:13:27.1774772007
Quadratic extensions under $\mathbb{C}$
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