< Zerfällungskörper < R < X^2+1 < C
Zeige, dass der Körper der komplexen Zahlen der Zerfällungskörper
des Polynoms ist.
![{\displaystyle {}X^{2}+1\in \mathbb {R} [X]}](../../../../../I/af21bd3891696d6efb702a56054a80f6222dc094.svg)
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