[tex]A=(\frac{1}{1-\sqrt{x}}+\frac{1}{1+\sqrt{x}}): (\frac{1}{1-\sqrt{x}}-\frac{1}{1+\sqrt{x}})+\frac{1}{2\sqrt{x}}[/tex]
[tex]A=(\frac{1+\sqrt{x}+1-\sqrt{x}}{1-x}): (\frac{1+\sqrt{x}-1+\sqrt{x}}{1-x})+\frac{1}{2\sqrt{x}}[/tex]
[tex]A=\frac{2}{1-\sqrt{x}}.\frac{1-\sqrt{x}}{2\sqrt{x}}+\frac{1}{2\sqrt{x}}[/tex]
[tex]A=\frac{1}{\sqrt{x}}+\frac{1}{2\sqrt{x}}=\frac{3}{2\sqrt{x}}[/tex]
Sorry bạn nha, ở trên mk gõ lỗi Latex