Bestimme das Inverse von
im Körper Q [ 5 , 7 ] {\displaystyle {}\mathbb {Q} [{\sqrt {5}},{\sqrt {7}}]} .
![{\displaystyle {}\mathbb {Q} [{\sqrt {5}},{\sqrt {7}}]}](https://wikimedia.org/api/rest_v1/media/math/render/svg/39695912cceaf93e09b971ee8104d07cce3dab5d)
.
