Đáp án:
Giải thích các bước giải:
`-10x^2+7x+12`
`=-10x^2+8x-15x-12`
`=-2x(5x+4)-3(5x+4)`
`=-(5x+4)(2x-3)`
`-10x^2 + 7x + 12`
`= -(10x^2 - 7x - 12)`
`= -(10x^2 - 15x + 8x - 12)`
`= -[5x(2x - 3) + 4(2x - 3)]`
`= -(2x - 3)(5x + 4)`
Exercise 6. Complete the second sentence so that it has the same meaning as the first one. 1. Her old house is bigger than her new one. => Her new house……………………………………......... 2. No one in my class is taller than Peter. => Peter ………………………………………………. 3. The black dress is more expensive than the white one. => The white dress …………………………………………… 4. According to me, English is easier than Maths. => According to me, Maths …………………………………. 5. No one in my group is more intelligent than Mary. => Mary ………………………………………………………. 6. No river in the world is longer than the Nile => The Nile ………………………………………………….. 7. Mount Everest is the highest mountain in the world. => No mountain ……………………………………………... 8. This is the first time I have ever met such a pretty girl. => She is …………………………………………………….. 9. He works much. He feels tired. => The more ………………………………………………… 10. This computer works better than that one. => That computer ……………………………………………..
Giải thích và phân tích câu tục ngữ Nhất nước nhì phân tam cần tứ giống
IV. Use the adjective in brackets in their correct forms of comparison to complete the sentences. 1. Tea is coffee. (cheap) 2. The new harvest machine is than the old one. (effective) 3. The countryside is the town. (beautiful) 4. A tractor is a buffalo. (powerful) 5. My sister is me. (tall) 6. Blue whales are elephants. (heavy) 7. The Mekong River is the Red River. (long) 8. Do you think English is French in grammar? (easy) 9. My new bed is my old bed. (comfortable) 10. The film about my village town is than the book. (interesting) VI. Choose the best answers of these sentences. 1. Of the four dresses, I like the red one (better/ best). 2. Bill is the (happier/ happiest) person we know. 3. Pat’s cat is (faster/ fastest) than Peter’s. 4. This poster is (colourfuler/ more colourful) than the one in the hall. 5. Does Fred feel (weller/ better) today than he did yesterday? 6. This vegetable soup tastes very (good/ best). 7. Jane is the (less/ least) athletic of all the women. 8. My cat is the (prettier/ prettiest) of the two. 9. This summary is (the better/ the best) of the pair. 10. The colder the weather gets, (sicker/ the sicker) I feel.
9. Give the correct form of the verbs in brackets. 1. Vegetarians (not eat) __________________ meat 2. Bees (make) __________________ honey 3. Rice (not grow) __________________ in cold climates 4. Where Martin (come) __________________ from? He (be) _________ Scottish 5. Bad driving (cause) __________________ many accidents 6. Sue can (speak) __________________ Vietnamese very well 7. We usually (go) __________________ to the library three times a week, but last week we (go) __________________ twice 8. Yesterday, I (be) _______________ busy, so I (not have) ________________ time to phone you 9. Would you like (come) __________________ to dinner tomorrow? 10. Mary usually (wash) __________________ her hands before meals 11. How you (get) __________________ there yesterday? 12. She (learn) __________________ Spanish since she was ten 13. The Greens (go) __________________ round the museum when it rained yesterday 14. Please ask them (turn) __________________ off the lights 15. I enjoyed (read) __________________ the books 16. My father (buy) __________________ a new bookshelf yesterday 17. They (live) __________________ here for a month 18. We don’t mind (work) __________________ at night 19. Rice (plant) __________________ in Asia 20. I’m looking forward to (meet) __________________ her
Chọn đáp án đúng : If he ________soon,he might miss the train. A.doesn't come B.isn't coming C.didn't come D.won't come => Đáp án là A nhưng mà might + Vinf của câu điều kiện loại 2 chứ nhỉ sao đáp án không phải là C ạ.Ai giải thích với
I. Choose the word that has the underlined part pronounced differently from the others. 1. A. neighbor B. cough C. although D. drought 2.A. entertain B. rain C. air D. strain 3.A. try B. facility C. typhoon D. supply 4.A. supermarket B. ruler C. pollution D. urban 5.A. nature B. migrant C. facility D. away 6.A. traffic B. relative C. tragedy D. jam 7.A. apartment B. offer C. prefer D. another 8.A. nature B. pressure C. urban D. supply 9.A. create B. peaceful C. increase D. easily 10.A. accessible B. pressure C. illness D. success II. Choose the words that have the different stress from the others. 1.A. nomadic B. generous C. colourful D. countryside 2.A. popular B. calculus C. beehive D. disturb 3.A. harvest B. collect C. peaceful D. whisper 4.A. charade B. transport C. expect D. paddy 5.A. opportunity B. inconvenient C. facility D. optimistic III. Write the comparison of these adjectives and adverbs. Tính từ/ Trạng từ So sánh hơn 1. beautifully 2. hot 3. crazy 4. slowly 5. much 6. little 7. badly 8. well 9. attractively 10. big
A=/2022-X/+/2021-X/ B=/X-5/-/X-7/
cho ΔABC có BC = 12cm, góc B= 60, góc C= 40. Tính: a. Đường cao AH và AC b. Diện tích ΔABC mình cần gấp lắm nhé mn, ai nhanh vote 5 sao với ctlhn nhé
16. Our teacher would like us to stop talking in class. Our teacher wishes............................................................................................... 17. Alice would love Lisa to get a job with a higher salary. Alice wishes ......................................................................................................... 18.John would like to be a pilot when he grows up. John wishes .......................................................................................................... 19. I’d love it to stop raining so that I can go out. I wish.................................................................................................................... 20. Mary wants Tom to go home early to play chess. Mary wishes .........................................................................................................
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