Giúp mình với Bài 1 : rút gọn biểu thức a) x(3x+2)+(x+1)^2-(2x-3)(2x+3) b) (2x-3) (x^2+2x-4) Bài 2: Tính a) (2x-1/2y)^3 b) (y-1/3)^3 c) (1/2x-1/3)^2 d) (2x+3y)^2

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_________________________________________________________ 5. The police didn’t find the lost boy yesterday. → ___________________________________________ 6. About thirty million people are watching this live show now. → ______________________________________________________________ 7. They were carrying the injured player off the field at that time. → _______________________________________________________________ 8. Jack has typed the article recently. → __________________________________________________________ 9. The police haven’t found the murderer yet. → ____________________________________________________________ 10. They were carrying the injured player off the field at that time. → __________________________________________________________ 11. They had wrapped the package carefully before they posted it. → ___________________________________________ 12. Children should treat old men with respect. → ________________________________________________________ 13. The computer can do all the accounts. → ______________________________________________________ 14. They are going to build a new school. → _______________________________________________________ 16. They will pull down that building → _________________________________________________________ 17. The teacher won’t correct the exercises tomorrow. → ___________________________________________________________ 20. They may use that room for the classroom. → _________________________________________________________ 21. You must wash your hands. → _________________________________________________________ 24. Nobody has used this room for ages. → _________________________________________________________________ 25. No one can solve that problem. → _____________________________________________________________ 26. No one told us the news. → ___________________________________________________________ 27. Paul didn’t tell me the ending of the story. → __________________________________________________________ 28. The teacher will give her a prize if she works well. → ________________________________________________________________ 29. Her mother bought her a doll last week. → ______________________________________________________________ 30. The police found the robber in the forest yesterday. → _______________________________________________________________

1. They cancelled all the flights because of fog. All the flights ……………………………………………….. 2. People advised us not to go out alone. We ……………………………………………… 3. The girl did not give me the money. I ……………………………………………………………….. 4. A man asked me several difficult questions at the interview. I ……………………………………………………….. 5. Nobody told me the story. I ……………………………………………. 1. You must take off your shoes. . ................................................................................................................................ 2. He shouldn’t smoke cigarettes in this room. . ................................................................................................................................ 3. We could see Tom in the crowd. . ................................................................................................................................ 4. Eddie might help you if you ask him. . ................................................................................................................................ 5. We can order some lemonade at the bar. . ................................................................................................................................ 8. You should speak English in class. . ................................................................................................................................ 10. People would buy tickets at this booth. . ................................................................................................................................ 11. They can book rooms in advance. . ................................................................................................................................ 12. We may borrow his car for a day. . .................................................. 1. 1. My father is washing the car. - 2. 2. Farmer Joe is milking the cows. - 3. 3. She is taking a picture of him. - 4. 4. I am writing a poem. - 5. 5. We are not playing football. - 6. 6. He is not wearing a tie. -