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Q(sqrt(5)+i) is algebraic
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Galois group of x^3-3x+3
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Splitting field of x^7-7
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Galois group of x^4-20x^2+80
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Why you can't solve quintic equations (Galois theory approach) #SoME2
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The Insolvability of the Quintic
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How to Get to Galois Theory Naturally
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