Rút gọn: 1/căn2-căn3 - 1/căn3+căn2

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

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

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

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

`= -2\sqrt{3}`

`@`Duongg7109612009