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tandunga1k62
2 năm trước
Cho phương trình mx² - 2(m + 1)x + (m - 4) = 0 ( m là tham số).Tìm m để phương trình có 2 nghiệm trái dấu,khi đó nghiệm nào có giá trị tuyệt đối lớn hơn
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