Cú tui 2 câu này dzới

`A=\sqrt{3-\sqrt{5}}+\sqrt{3+\sqrt{5}}`

`A=(\sqrt{2}(\sqrt{3-\sqrt{5}}+\sqrt{3+\sqrt{5}}))/(\sqrt{2})`

`A=(\sqrt{2(3-\sqrt{5})}+\sqrt{2(3+\sqrt{5})})/(\sqrt{2})`

`A=(\sqrt{6-2\sqrt{5}}+\sqrt{6+2\sqrt{5}})/(\sqrt{2})` 

`A=(\sqrt{5-2\sqrt{5}+1}+\sqrt{5+2\sqrt{5}+1})/(\sqrt{2})` 

`A=(\sqrt{(\sqrt{5}-1)^2}+\sqrt{(\sqrt{5}+1)^2})/(\sqrt{2})` 

`A=(|\sqrt{5}-1|+|\sqrt{5}+1|)/(\sqrt{2})` 

`A=(\sqrt{5}-1+\sqrt{5}+1)/(\sqrt{2})`

`A=(2\sqrt{5})/(\sqrt{2})`

`A=\sqrt{2}·\sqrt{5}`

`A=\sqrt{10}`

`2)`

`A=\sqrt{2+\sqrt{3}}-\sqrt{2-\sqrt{3}}`

`A=(\sqrt{2}(\sqrt{2+\sqrt{3}}-\sqrt{2-\sqrt{3}}))/(\sqrt{2})`

`A=(\sqrt{2(2+\sqrt{3})}-\sqrt{2(2-\sqrt{3})})/(\sqrt{2})`

`A=(\sqrt{4+2\sqrt{3}}-\sqrt{4-2\sqrt{3}})/(\sqrt{2})`

`A=(\sqrt{3+2\sqrt{3}+1}-\sqrt{3-2\sqrt{3}+1})/(\sqrt{2})`

`A=(\sqrt{(\sqrt{3}+1)^2}-\sqrt{(\sqrt{3}-1)^2})/(\sqrt{2})`

`A=(|\sqrt{3}+1|-|\sqrt{3}-1|)/(\sqrt{2})`

`A=(\sqrt{3}+1-\sqrt{3}+1)/(\sqrt{2})`

`A=2/(\sqrt{2})`

`A=\sqrt{2}`