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quyen1842004
2 năm trước
Cho pt x^2 +(m-2)x-(m^2+1)=0 Câu a chứng minh rằng phương trình luôn có 2 nghiệm phân biệt với mỗi giá trị của m Câu b tìm m để x1mũ 2 + x2 mũ 2=10 Giúp mik vs
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