user-avatar
435114573747274
2 năm trước
1 phân tích đa thức thành nhân tử a,x^2+2x(y+1)+1+2y+y^2 b, x^2+9x+8 c,x+x-42 d, x^2+9x+8 2 cmr: A=(2020^5-2020^3) chia hết 2019*2020*2021
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mark the letter A, B, C or D to indicate the word whose underlined part is pronounced differently from that of the rest in each of the following questions. 1. A. chopstick B. champion C. character D. cherry 2. A. supper B. hungry C. punish D. campus 3. A. warned B. reduced C. covered D. moved Mark the letter A, B, C or D to indicate the word that differs from the other three in the positionof primary stress in each of the following questions. 4. A. ancient B. spacecraft C. despite D. even 5. A. generous B. extensive C. resources D. eternal 6. A. regular B. poisonous C. atmosphere D. appliance Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. 7. I suggest__________some money for the poor children in our area.A. raise B. to raise C. raised D. raising 8. The first__________of a book is sometimes very valuable.A. author B. edition C. type D. title 9. Oh dear, there’s a leak in my water pipe; I’ll have to call the__________.A. builder B. electrician C. carpenter D. plumber 10. You can__________my surprise when I heard the news.A. see B. believe C. think D. imagine 11. They made themselves understood by using__________language.A. hand B. sign C. finger D. acting 12. Trains stop here in order to__________passengers only.A. pick up B. get off C. get on D. pull in 13. The telephone is said to__________by Alexander G. Bell. A. have invented B. be inventing C. have been invented D. being invented 14. She turned up at the party dressed in the__________style.A. final B. latest C. last D. actual 15. “Are you leaving?” – “Yes, but I wish I__________to go.”A. don’t have B. won’t want C. mayn’t have D. didn’t have 16. That’s the artist__________paintings are very fashionable. Trang 17 A. which B. who C. whose D. whom 17. __________we arrived late, we didn’t miss the first part of the show.A. Despite B. Even though C. In spite of D. However 18. You should hear Lucy play__________guitar. It’s wonderful.A. the B. a C. one D. any 19. I was angry with her__________.A. but it didn’t matter B. so she didn’t go away C. because she was rude to me D. and she is rude to me. Mark the letter A, B, C or D to indicate the most suitable response to complete each of thefollowing exchanges. 25. “Could you do me a favour, please?” “_________”A. Sure. No problem.B. Do you really need help?C. No, thank you.D. Yes, and when’s that? 26. What’s your new address?” “_________” A. It’s the old one. B. Go straight on. C. Flat 42B, 225 Addison Road. D. What do you want to know? Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlinedword(s) in each of the following questions. 27. Many language learners do not try to learn all new words they come across.A. study B. like C. meet D. Thunderbird. 28 Electric cars are better for the environment. In addition, they can save money on petrol.A. In conclusion B. For example C. Nevertheless D. Furthermore Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlinedword(s) in each of the following questions. 29. The tendency to develop cancer, even in high-risk individuals, can be decreased by increasing theamount of fruit and vegetables in the diet.A. consuming B. growing C. lessening D. stopping 30. With butterflies in my stomach, he waited for his job interview.A. nervously B. patiently C. happily D. courageously Read the following passage and mark the letter A, B, C or D to indicate the correct word thatbest fits each of the numbered blanks.Birds are fascinating to many people, and bird watching is a popular hobby. The best time towatch birds is in the early morning, (31)_________birds are usually very active at that time of day. Theobserver must keep still and quiet in order not to (32)_________the birds away. If you live in a part ofthe world where migratory birds spend their breeding season, then you will have the (33)_________tosee nest-building activity. Over the ages, different species of birds have evolved with different types ofnest-building skills. It makes an interesting study to (34)_________the different types of nests built bybirds and to watch them as they build their nests. After the breeding season is over and the babies haveleft the nest, it is time for the birds to head for (35)_________parts of the world to spend the wintermonths. Birds navigate to their winter feeding grounds, using the stars or the sun as their guide. 31. A. so B. because C. though D. but 32. A. upset B. throw C. frighten D. worry 33. A. time B. prospect C. occasion D. opportunity 34. A. look at B. take after C. care for D. see off 35. A. warmer B. cooler C. hotter D. colder

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team