Giả bài sau theo các bước : B1 : Tìm ĐK để pt có 2 ` n^o ` ` x_1 ` , ` x_2 ` Tìm ĐK để pt có 2 ` n^o ` ` x_1 ` , ` x_2 ` $\left \{ {{ a \ne 0 } \atop { Δ \geq 0 }} \right.$ B2 : Áp dụng định lí vi - ét tính được ` S ` ` = `` x_1 + x_2 ` , ` P ` ` = ` ` x_1 . x_2 ` B3 : Từ ĐK ( T ) và S tính ` x_1 ; x_2 ` theo ` m ` thế vào ` P ` để tìm thử lại ĐK

Choose the word having “E” pronounced differently with others. 1,desert 2,held 3,celebrate 4,prefer Choose the word having “ED” pronounced differently with others. washed attended decided disappointed Câu 3 Find the words which has a DIFFERENT STRESS pattern. expensive difficult dangerous beautiful Câu 4: Chose the word having “A” pronounced differently with others. plane station pavement traffic Câu 5 :Find the words which has a DIFFERENT STRESS pattern. significant excellent wonderful marvelous Câu 6: Find the words which has a DIFFERENT STRESS pattern. hospital tomorrow motorbike exercise Câu 7 :Find the words which has a DIFFERENT STRESS pattern. enter include agree decide Câu 8:Find the words which has a DIFFERENT STRESS pattern. 2 science motion design fiction Làm mình cả trong hình và ngoài hình

among young children A emailing B. video chatting 23. The road in front of my office is always A. to flood B. flooding 24. A severe tropical A. drought B. rain 25. If you were the president, what A. will 26. A person who C. telepathy D. social media when it rains heavily. C. flood is called a typhoon. C. flood D. flooded you do to help the environment? B. did C. would the bagpipes is called a piper. B. performs 27. The team's success was largely A. because B. due to her efforts. A. plays C. entertains C. since 28. The Maori in New Zealand greet each other by A. punching B. touching C. blowing 29. Australia is composed of seven 30. There is a red maple A. nations B. countries leaf on the B. banner D. do D. does D. however their noses. D. smelling C. states of Canada. C. money Question III. Give the correct form of the following words A. flag 1. If we use water carefully, more people (have). 2. If the factory (continue) D. storm D. provinces D. billboard fresh water. animals will die. dumping poison into the lake, all the fish and other a science fiction film on TV at 9.00 tonight. 3.1 (watch) 4. Many houses (destroy) 5. You (not pass) in the hurricane last night in Nghe An. your driving test unless you drive more carefully. 6. He'll be ill if he (not stop) 7. By the time the police came, the thief (leave) worrying so much. 8. We (save) 9. Four countries thousands of trees if we don't waste paper. (visit) by John so far. 10. London (have) a population of eight million people. 11. The Statue of Liberty in New York is a monument which (symbolize) freedom. 12. Vietnam's Independence Day (celebrate) on September 09th. (visit) Sydney Opera House for several times. 13. We 14. Some activities 15. Don't forget (turn), C.READING (prepare) to celebrate the lunar new year now. off the lights before going to bed. Question I. Complete the passage with the given words in the box. step people numbers food damage clothing Natural (1).. life or (2)... become disasters can be destructive; they can wreak havoc across large areas and cause loss of to property. We cannot prevent natural disasters, but we can prepare for them. The first (3)... is to learn about the risks in your area and read the information about natural disasters on local government sites. Next, find out what the rescue and emergency workers advise. These (4)...have been trained to deal with disasters, have been through lots of them and know how to help. Make sure you have all the emergency contact (5)...... .........entered in your mobile phone. It is also important that you put together an emergency supply kit. Your emergency supply kit should include (6)...... .............. water, medications, personal hygiene items, copies of personal documents and some money. You may also need some extra (7).... force people to leave their homes so you should also (8)...... if you live in a cold climate. Natural disasters can familiar with the guidelines for evacuation. Plan safe places to meet your family and get to know the evacuation routes and shelters. Question II Read the passage and answer the questions. Visual pollution has a greater effect on people than you may think. I remember when I went to a big city, I was mally scared because so much graffiti on the buildings' wall. Then I looked up, and I saw a lot of power lines aquatic

“Thành thị là hình ảnh tương phản với lãnh địa”. Sự tương phản đó thể hiện như thế nào?

Nếu đốt nóng một băng kép được cấu tạo bởi 2 lá kim loại mỏng là sắt và đồng dán dính vào nhau thì: A.Băng kép sẽ bị cong về phía lá sắt. B.Băng kép sẽ bị cong về phía lá đồng. C.Băng kép không bị cong, chỉ nở dài ra thôi. D.Cả ba đáp án trên đều sai.

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Đun nóng este x đơn chức mạch hở với NaOH thu được muối và ancol đốt cháy hoàn toàn a mol x với v lít CO2 điều kiện tiêu chuẩn và nước cho toàn bộ sản phẩm cháy vào nước vôi trong thu được 20 gam kết tủa dung dịch a và khối lượng bình tăng 37,2 g đun nước lọc được 20 gam kết tủa nữa biết rằng x có phản ứng tráng gương vậy công thức của x là

Viết đoạn văn diễn dịch từ 6-8 câu để làm rõ câu chủ đề: "Đọc sách là có một vai trò quan trọng" trong đó có sử dụng 2 quan hệ từ, 2 đại từ nhé

V. Choose one sentence that has the same meaning as the root one. 36. Although I was very tired, I couldn’t sleep. A. In spite of being very tired, I could sleep. B. In spite being very tired, I couldn’t sleep. C. In spite of to be very tired, I couldn’t sleep. D. In spite of being very tired, I couldn’t sleep. 37. Let’s decorate the house and make lots of cakes for Tet. A. I suggest decorating the house and making lots of cakes. B. I suggest being decorated the house and making lots of cakes. C. I suggest to decorated the house and making lots of cakes. D. I suggest should decorate the house and making lots of cakes. 38. Promise to try harder or I won’t help you. A. If you promise to try harder, I won’t help you. B. If you don’t promise to try harder, I will help you. C. If you don’t promise to try harder, I won’t help you. D. Unless you don’t promise to try harder, I won’t help you. 39. We didn’t go out because of the rain. A. Because it was raining, we didn’t go out. B. Because it was rain, we didn’t go out. C. Because it was not raining, we didn’t go out. D. When it was raining, we didn’t go out. 40. The storm destroyed the town completely. A. The town destroyed completely by the storm. B. The town was destroyed completely by the storm. C. The town was destroyed by the storm completely. D. The town was completely by the storm destroyed

Simple Past or Present Perfect - Exercise 1. Peter ........... football yesterday 2.They ........... the car. It looks new again 3.last year we ........... to Italy 4.John and Peggy ...........the book. Now they can watch the film 5.I.......... my friend two days ago 6.We............another country before 7.She .............a new car in 2005 8.I'm sorry , but I...........my homework 9.You ...........the game of chess 10.The girls............ their lunch yet