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Wouldn't mind a hint on how to start part iii), thanks.

edit: in my notes i have for a similar question:

*'L=Q(2*

F=Q(6

degree of the min polynomial = 2, because L=F(a) and [L:F]=2' (a = alpha)

^{0.5}, 3^{0.5})F=Q(6

^{0.5})degree of the min polynomial = 2, because L=F(a) and [L:F]=2

Could someone clarify what L=F(a) means so I can understand the example? Thanks

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