$\begin{cases}(3x+\frac{5}{y} )^3-\frac{45x}{y}=9  \\ \frac{15x}{y}(3x+\frac{5}{y} )=6  \end{cases} $
Bạn chú ý cách đặt câu hỏi nhé. Không dc add ảnh để đưa vào. Bạn nên nhập trực tiếp câu hỏi từ bàn phím. Bạn nên tham khảo Video hướng dẫn nhập công thức phía trên. Thanks. BQT –  hoàng anh thọ 14-06-13 02:33 PM

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 01:34 PM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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