Question

2√5/√5-√3. СРОЧНО!!! ДАЮ 100БАЛЛОВ ААААА

Answer 1

$2 times 1 - sqrt{3} = 2 - sqrt{3}$

Answer 2

$frac{2sqrt{5}}{sqrt{5}-sqrt{3}}=frac{2sqrt{5}*(sqrt{5}+sqrt{3})}{(sqrt{5}-sqrt{3})(sqrt{5}+sqrt{3})}=frac{2*5+2sqrt{15}}{5-3}=frac{10+2sqrt{15}}{2}=5+sqrt{15}$