a) `(-3xy^3)^3 . ( -2/3 x^4y)`
`= (-3)^3 x^3 (y^3)^3 . (-2/3) x^4y`
`= [ -27 . (-2/3)] . (x^3 x^4) .( y^9 y)`
`= 18 x^7 y^10`
Bậc: `17`
b) `-2/3 xy^2 - 2xy + 4x^2y + 12 + 2xy^2 - 3xy - 20 - 4x^2y`
`= (-2/3 xy^2 + 2 xy^2) - (2xy + 3xy) + (4x^2y - 4x^2y) + (12 -20)`
`=4/3 xy^2 - 5xy -8`
Bậc: `3`
Đáp án:
$\\$
`a,`
`(-3 xy^3)^3 . (-2/3 x^4y)`
`= -27 x^3 y^9 . (-2)/3 x^4y`
`= [(-27) . (-2/3)] (x^3 . x^4) (y^9 . y)`
`= 18 x^7 y^{10}`
Bậc : `7 + 10 = 17`
Vậy Bậc của đa thức là : `17`
`b,`
`(-2)/3 xy^2 - 2xy + 4x^2y +12 + 2xy^2 - 3xy -20 - 4x^2y`
`= ( (-2)/3xy^2 + 2xy^2) + (-2xy - 3xy) + (4x^2y-4x^2y) + (12 - 20) `
`= 4/3 xy^2 - 5xy- 8`
Bậc : `3`
Vậy Bậc của đa thức là : `3`
giup minh vs nhe ko can lam nhanh
Giúp mình với mình cần gấp ⭐⭐⭐⭐⭐
Mình sẽ vote cho câu trả lời chi tiết nhất nha
các bạn giúp mik với hứa vote 5 sao
VIII. Use the correct form of the word 1. He draws cartoon for a ……………….magazine.(humor) 2. For some people UFOs only exist in films for ……………..(entertain) 3. There are over 50 ………………….. in the talent contest. (compete) 4. We should use paper as …………………as we can.(economy) 5. His sudden ……………. must be a shock to his family.(die) 6. Why don’t you throw that laptop away? It is quite …………..to you now. (use) 7. Congratulation! You have made ……………..progress in your study so far. (remark) 8. Jesus is well-known for his ……………….(wise) 9. I’m afraid that some medical facilities are ………………to people in remote areas. (access) 10. The doctor gives the patient an injection to ease his pain and …………….(anxious) 11. He usually says his ……………….before breakfast. (pray) 12. These farmers are going to ………………their rough field to make a football pitch. (flat) 13. This ………………….woman never allows her daughter to talk to any boys. (fashion) 14. The computer doesn’t work because she hasn’t connected it ……………….(proper) 15. Most ghost stories are set in …………………old houses or castles. (mystery) 16. What a …………….! She has the heating switched off all winter. (mean) 17. We killed the time ……………………….doing that funny crosswords. (enjoy) 18. The book was found ……………………boring, so the teacher chose another. (believe) 19. Those pollutants have ………………the lives of many seabirds in the past few years. (danger) 20. The man’s application was turned down because he was fully ………………..(qualify) 21. We have some home ……………..to do (assign) 22. No one can deny the …………….of his contribution. (precious) 23. …………………….is better than cure. (prevent) 24. I’d like to make a ………………about the faulty goods I bought. (complain) 25. This book is very ………………to us. (value) 26. We asked her to take part but she made no ……………….to us. (respond) 27. Taxis are too ……………for may people to afford. (cost) 28. One major …………………of the area is the lack of public transport. (advantage) 29. There is a wide ………………of TV programs for children to watch. (vary) 30. The talk he gave was both ………………………….and interesting. (inform)
mn giúp mình với đang cần gấp á bạn nào giúp mình minh cho 5 sao và 1 tim
Tiếng Anh lớp 7 ạ mong mọi người giúp đỡ em bài này ạ
VII. Use the correct tense or form of the verbs 1. I don’t mind (wait)…………………..I’d rather (be)………………….too early than too late 2. I remember (play)……………hide and seek with my playmates when I (be) …………..a child. 3. The monitor suggests (go)………………. to the movies today, but I cannot go because I’m busy (work)………………… on my assignment (give)…………………by Professor Smith. 4. The boy had his bike (repair) ……………………yesterday. 5. The principle (talk) ………………to us when our teacher arrived 6. We would rather (not, go) …………………… to that club again. 7. Several languages (speak)……………………here 8. Your shirt is dirty. It needs (wash) ……………………. 9. Hoa,It’s time you (go) ………………..to bed 10. After the guest (leave)………………she (go) ……………..back into the leaving room and (switch)……………. off the lights 11. On arrival at home I (find ) …………….that she just (leave) ……………a few minutes ago 12. She enjoyed (take care of)………………………….. 13. What would the teacher do if a student (catch) ………………..cheating in the exam room? 14. I get used to (walk) ………………..to school every day 15. These workers were made (work) ………………..8 hours a day 16. Most of the little girls enjoy (play) ……………….with their dolls 17. I wish I (meet) ………………..you earlier 18. I wouldn’t be here now ,if I (need) …………………your help 19. I’d like the have this letter (translate)……………..into Vietnamese 20. He (have) …………………dinner when I arrived 21. Her father is said (be)………………….very good at cooking 22. I would buy these books if they (be) ………………..cheaper 23. I wish I (can) ……………help you 24. Jane is trying to avoid (meet) ……………….him 25. Your book should (take) ……………….great care of 26. The sign warns you (not,turn) …………………….right on a red light 27. You must keep (practice)…………..on the computer until you understand how to use all the programs 28. What (you,do)………………….if you (be) ……………..in my situation 29. She asked me (not, sit) ……………………near the window 30. The boy spent half an hour (look) ……………….for his work book 31. Most people don’t mind (work) ………………….overtime occasionally 32. It’s hard to imagine (live)……………without electricity 33. She doesn’t allow anyone (read) …………….her diary, but yesterday she (find) ……………. her mum (read)………………..it 34. It is no use (regret ) ………….what you have done 35. The form teacher got her students (take) ………………….part in the contest (hold)……………in the school yard (celebrate) …………….the school’s 20th foundation day. 36. She stopped (type) ……………….(take) ……………. a nap 37. My friend suggested (rent) ………………a room near our school 38. It’s time you (go) ……………to the airport. I am afraid that by the time you arrive at the airport tonight, the plane (take) …………………….off 39. If he (read) …………..in bad light, he (ruin) …………………his eyes 40. He had a bad fall while he (repair) ………………..his roof
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