gIẢI hệ: vì mình mới dùng nên k0 biết cách viết dấu hệ 
Hệ :
pt1: (x+1)x^{3} +(y+1)x^{3} =28
pt2: x+y+xy =2

bị xóa vì bị trùng bởi quangtinh112@gmail.com, Trần Nhật Tân 03-01-14 03:18 PM

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

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