Question

Aduceti la forma cea mai simpla expresia:
-10√125+2√108+7√192-3√245

Answer 1

$-10* \sqrt{25*5}+2* \sqrt{64*2}+7* \sqrt{64*3}-3 \sqrt{49*5}=$=
=-$10 \sqrt{5}+16 \sqrt{2}+56 \sqrt{3}-21 \sqrt{5} =16 \sqrt{2}+56 \sqrt{3}-11 \sqrt{5}$