Question

Срочно! №922 а,б. смотрите вложения!)

Answer 1

а) $5+sqrt{y}/5sqrt{y}+y=5+sqrt{y}/(5+sqrt{y})sqrt{y}=1/sqrt{y}$

 

 б) $3x-6/sqrt{x}+sqrt{2}=3(x-2)/sqrt{x}+sqrt{2}=3(sqrt{x}-sqrt{2})(sqrt{x}+sqrt{2})/sqrt{x}+sqrt{2}=3sqrt{x}-3sqrt{2}$ или $3(sqrt{x}-sqrt{2})$