A= \(\frac{\sqrt{x}+3}{\sqrt{x}-2}\)\(-\frac{\sqrt{x}+2}{\sqrt{x}-3}\)+\(\frac{\sqrt{x}+2}{\left(\sqrt{x}-2\right)\cdot\left(\sqrt{x}-3\right)}\)
=\(\frac{x-9-x+4+\sqrt{x}+2}{\left(\sqrt{x}-2\right)\cdot\left(\sqrt{x}-3\right)}\)
=\(\frac{\sqrt{x}-3}{\left(\sqrt{x}-2\right)\cdot\left(\sqrt{x}-3\right)}\)
=\(\frac{1}{\sqrt{x}-2}\)
Vay A= \(\frac{1}{\sqrt{x}-2}\)