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nghinhoc20051999
2 năm trước
cac ban lam giup minh ,minh cho 5 sao bài 1 (x + x) – 2(x + x) –15 x 3 – x 2 – 4 = 0 (x + 5)(4x – 1) + x2 – 25 = 0 Bài 2: Cho phương trình: (m – 1)x2 – (7 – 2m)x – 6 = 0 có một nghiệm là 2. Tìm nghiệm còn lại của phương trình. Bài 3: Định m để 2 phương trình sau tương đương 2x – 5 = 0 và (m – 1)x + 3 = 5m – 2x
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