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Alex
2 năm trước
Cho hpt {2x - y = m -1 {3x + y = 4m +1 ( m là tham số) a) giải hpt với m =2 b) Tìm m để hpt có nghiệm duy nhất (x;y) thoả mãn 2x^2 - 3y = 2 Giúp em với ạ em cảm ơn
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