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bonggau839
2 năm trước
Phương trình $x^2 - 2mx + m^2 - 1 = 0$ có 2 nghiệm $x_1$ = 0, $x_2$ > 0 là: A. m = ±1 B. m = -1 C. m > 0 D. m = 1 GIẢI CHI TIẾT MỚI CHỌN ĐÁP ÁN Ạ!
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