The Insolvability of the Quintic
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What is the square root of two? | The Fundamental Theorem of Galois Theory
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But why is there no quintic formula? | Galois Theory
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Les groupes de Galois, révolution mathématique ( avec démonstration ) - Passe-science #31
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The shocking connection between complex numbers and geometry.
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The derivative isn't what you think it is.
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I can solve any quintic equation!!
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Why you can't solve quintic equations (Galois theory approach) #SoME2
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