Rút gọn biểu thức sau đây
giải nhanh giúp mình nha
----- Nội dung ảnh -----
7) \( A = \left( \frac{x+3}{x-9} + \frac{1}{\sqrt{x+3}} \right) \cdot \frac{\sqrt{x}}{\sqrt{x+3}} \)
8) \( A = \left( \frac{2x}{x-\sqrt{x}} + \frac{2}{\sqrt{x}-1} \right) \cdot \frac{4\sqrt{x}+4}{\sqrt{x}-1} \)
9) \( A = \left( \frac{1}{\sqrt{x-2}-\sqrt{x-4}} \cdot \frac{1}{\sqrt{x}-2} \right) \)
10) \( A = \frac{5-5\sqrt{x}}{x-16} - \frac{2}{4-\sqrt{x}} + \frac{3}{\sqrt{x}+4} \)
----- Nội dung ảnh -----
7) \( A = \left( \frac{x+3}{x-9} + \frac{1}{\sqrt{x+3}} \right) \cdot \frac{\sqrt{x}}{\sqrt{x+3}} \)
8) \( A = \left( \frac{2x}{x-\sqrt{x}} + \frac{2}{\sqrt{x}-1} \right) \cdot \frac{4\sqrt{x}+4}{\sqrt{x}-1} \)
9) \( A = \left( \frac{1}{\sqrt{x-2}-\sqrt{x-4}} \cdot \frac{1}{\sqrt{x}-2} \right) \)
10) \( A = \frac{5-5\sqrt{x}}{x-16} - \frac{2}{4-\sqrt{x}} + \frac{3}{\sqrt{x}+4} \)