Rút gọn căn thức
a) \(\left(\dfrac{2}{\sqrt{x}-3}+\dfrac{1}{\sqrt{x }+3}\right)\dfrac{\sqrt{x}+1}{\sqrt{x}-3}\)
b) \(\dfrac{2x+3\sqrt{x}}{x\sqrt{x}+1}+\dfrac{1}{x-\sqrt{x}+1}-\dfrac{1}{\sqrt{x}+1}.\dfrac{x-\sqrt{x}+1}{\sqrt{x}}\)
Mai em ktra rồi. Các bác giúp em với. E c.ơn nhiều ạ
a/
\(\left(\dfrac{2}{\sqrt{x}-3}+\dfrac{1}{\sqrt{x}+3}\right).\dfrac{\sqrt{x}+1}{\sqrt{x}-3}\\ =\dfrac{2\left(\sqrt{x}+3\right)+\sqrt{x}-3}{\left(\sqrt{x}-3\right)\left(\sqrt{x}+3\right)}.\dfrac{\sqrt{x}+1}{\sqrt{x}-3}\)