Răspuns :
[tex]Ma=(3\sqrt{21} +7\sqrt{21})/2\\=10\sqrt{21} /2\\=5\sqrt{21} \\\\Mg=\sqrt{3\sqrt{21}*7\sqrt{21} }\\=\sqrt{21*21}\\ =21\\[/tex]
Explicație pas cu pas:
- Ma=(3radical21+7radical din 21 )/2
- =10radical21/2
- =5radical21
Mg=radical lung3radical21×7radical21
=radical lung 21×21
=41