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hophuong2005sinhnam
2 năm trước
Xác định m để phương trình : (m +1)x^2 +2( m +4 )x +m + 1 = 0 a) có hai nghiệm trái dấu b) có hai nghiệm âm phân biệt c) có hai nghiệm dương phân biệt
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giải giúp mình bài 2 với, mình đang cần gấp EXERCISE 2:CHUYÊN CÁC CÂU SAU SANG BỊ ĐỘNG. 1.The waiter brings me this dish. 2.Our friends send these postcards to us. 3.Their grandmother told them this story when they visited her last week. 4.Tim ordered this train ticket for his mother. 5.You didn't show me the special camaras. 6.She showed her ticket to the airline agent. 7.He lends his friend his new shoes. 8.She left her relatives five million pounds. 9.The shop assistant handed these boxes to the customer. 10.The board awarded the first prize to the reporter. 11.Have you sent the christmas cards to your family? 12.The committee appointed Alice secretary for the meeting. 13.He hides the broken cup in the drawer. 14.They keep this room tidy all the time. 15.They all voted the party a great success. 16. We gave Ann some bananas and some flowers. 17.They moved the fridge into the living room. 18.She bought some cups of tea to the visitors in the next room. 19.They find the new project worthless. 20.The secretary didn't take the note to the manager.

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