Sử dụng tính đơn diệu của hàm số giải phương trình:
$$\sqrt{2x^3+3x^2+6x+16}=2\sqrt{3}+\sqrt{4-x}$$

bị xóa vì bị trùng bởi Đức Vỹ 25-10-13 10:41 PM

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

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