Răspuns :
[tex](3 \sqrt{2}- \sqrt{5})* \sqrt{3}+ \sqrt{2}*( \sqrt{3}- \sqrt{20})+ \sqrt{5}( \sqrt{3} + \sqrt{8)}=
3 \sqrt{6}- \sqrt{15}+ [/tex][tex] \sqrt{6} - \sqrt{40} + \sqrt{15} + \sqrt{40}=4 \sqrt{6} [/tex]
[tex]\displaystyle \left(3 \sqrt{2} - \sqrt{5} \right) \cdot \sqrt{3} + \sqrt{2} \cdot \left( \sqrt{3} - \sqrt{20} \right)+ \sqrt{5} \cdot \left( \sqrt{3} + \sqrt{8} \right)= \\ =3 \sqrt{6} - \sqrt{15} + \sqrt{2} \cdot \left( \sqrt{3} -2 \sqrt{5} \right)+ \sqrt{5} \cdot \left( \sqrt{3} +2 \sqrt{2} \right)= \\ =3 \sqrt{6} - \sqrt{15} + \sqrt{6} -2 \sqrt{10} + \sqrt{15} +2 \sqrt{10} =4 \sqrt{6} [/tex]