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caothitinh2001
2 năm trước
cho phương trình x^2 + (2m-6) + m - 13 = 0 xác định m để phương trình có 2 nghiêm x1,x2 và biểu thức x1x2 - x1^2 - x2^2 đạt giá trị lớn nhất mong các cao nhân giúp e vs ạ
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