Đáp án:
Giải thích các bước giải:
1) $2\sqrt{3}$ · $3\sqrt{6}$ = $6\sqrt{18}$ = $18\sqrt{2}$
2) ( $-2\sqrt{2}$ · $\sqrt{10}$ = $-2\sqrt{20}$ =$-4\sqrt{5}$
3) ($-7\sqrt{7}$ )($-2\sqrt{8}$) = $14\sqrt{56}$ = $28\sqrt{14}$
4) $3\sqrt{3}$ · $5\sqrt{6}$ = $15\sqrt{18}$ = $45\sqrt{2}$
5) $-\sqrt{33}$ · $3\sqrt{3}$ = $-3\sqrt{99}$ = $-9\sqrt{11}$
6) $8\sqrt{6}$ · ( $-2\sqrt{24}$) = $-16\sqrt{144}$ =$-192$
7) $9\sqrt{3}$ · $3\sqrt{27}$ = $27\sqrt{81}$ = $243$
8) ($3\sqrt{5}$)·( $-10\sqrt{3}$) = $-30\sqrt{15}$
9) $\frac{1}{2}$ $\sqrt{5}$ · ($-6\sqrt{2}$) = $-3\sqrt{10}$