Đáp án:
`a)5a^2x-6axy+3ay^2`
`b)2(x-1)^2-(x-4y)^2`
Giải thích các bước giải:
`5a^2x - 3axy +3ay^2 -3axy`
`=5a^2x-3axy-3axy+3ay^2`
`=5a^2x-6axy+3ay^2`
`3x^2-16y^2 -8x+8xy+4`
`=(4x^2-8x+4)-(x^2-8xy+16y^2)`
`=4(x-1)^2-(x-4y)^2`
`=2(x-1)^2-(x-4y)^2`
viết ct nhập mảng a gồm n phần tử . a.xuất số lớn thứ 2 và vị trí của nó trong mảng b.xuất số nhỏ thứ 2 và vị trí của nó trong mảng
Tìm giá trị nguyên của x để biểu thức A có giá trị nguyên A= 6x^2-9x-13/3x-4
Viết câu hỏi cho các từ trong ngoặc trong các câu sau : 1. The doctor works (in the hospital.) 2. She will come here (at 10 o'clock.) 3. He is (a journalist .) 4. Mr.Ba writes for (Ha Noi Moi newspaper .) 5.(The yellow house) is the most suitable for our family . 6. The dentist takes care of (people's teeth .) 7. It is (about ten kilometers) from my apartment to their farm. 8. They are going to the farm with (their friends . ) 9. My book is( on the desk. ) 10. there are (three bedrooms) in Lan's home. cho dạng đúng của tính từ so sánh trong ngoặc: 1. That is ( comfortable ) ___________ house we have . GIÚP MIK NHA
II. Complete the sentence with a suitable word. 1. The Temple of Literature was _____________ in 1070. 2. Thong Nhat _____________ is a landmark in Ho Chi Minh City. 3. Ha Long Bay was recognised by UNESCO as a World _____________ Site. 3. Khue Van Pavilion was chosen as the _____________ of Hanoi. 4. The Imperial Academy was regarded as the _____________ university in Viet Nam. 5. The One Pillar _____________ was built in 1049. 7. Chu Van An was _____________ in 1292 in Van Thon Village. 8. Tran Quoc Pagoda is _____________ at the southeastern shore of West Lake. III. Choose the best answer a, b, c, or d to complete the sentence. 1. Oxford University is regarded ________ the oldest university in the UK. a. as b.in c.at d. by 2. Tickets are a bit harder to buy right on the pot, so you’d better book________ advance. a. for b.with c.of d. in 3. The stone stelae were ________ with the names and places of birth of 1307 graduates. a. written b.learned c.carved d.selected 4. Chu Van An was one of the most famous ________at the Imperial Academy. a. founders b.statues c.teachers d.doctors 5. The students of the Imperial Academy ________ by very famous scholars. a. are studied b. were taught c. have learned d. was educated 6. We ________ leave now or we’ll miss the bus. a. can b.shall c. had better d. shouldn’t 7. He bought a picture of the Temple of Literature as a ________ of his trip to Hanoi. a. souvenir b.landmark c. symbol d. tablet 8. ________ was the University of Cambridge formed? - In 1209. a. What b.Where c. How d. When 9. Huong Pagoda is a great ________ spot in Hanoi. a. see-sight b. sight-see c. seeing-sight d. sight-seeing 10. ‘________ to Hanoi?’‘Yes, I went there last year.’ a. Were you ever b. Have you ever been c. Did you ever go d. Were you ever gone IV. Write the correct form or tense of the verbs in brackets. 1. Glastonbury festival _______________ (organise) every year in the village of Pilton, England. 2. In 1076, King Ly Nhan Tong _______________ (build) the Imperial Academy as the first university of Vietnam. 3. The first temples of My Son Sanctuary _______________ (make) of wood in the 4th century. 4. An altar to Chu Van An _______________ (set) up in the Temple of Literature. 5. We _______________ (not do) any practice tests yet so I’m not sure what they’re like. 6. Wait a minute, he _______________(speak) to someone on his mobile. 7. Many different languages _______________ (speak) in Canada. 8. The Imperial City of Hue can _______________ (divide) into two main parts. 9. You’d better _______________ (rent) a bike if you want to travel around. 10. I don’t want to go to Huong Pagoda. How about _______________ (visit) Ho Chi MinhMausoleum? V. Supply the correct form of the words in brackets. 1. One Pillar Pagoda is a major tourist _______________ in Hanoi. (attract) 2. Imperial citadel of Thang Long is a _______________ complex built during the Ly Dynasty. (culture) 3. King Ly Nhan Tong was the _______________ of the Imperial Academy. (found) 4. In 1484, King Le Thanh Tong odered the _______________ of the first Doctors’ stone tablets. (erect) 5. The Imperial Academy was opened to educate _______________ students from all over the country. (talent) 6. The circle and square of the pavilion _______________ the heaven and the earth. (symbol) 7. The 82 Doctors’ stone tablets have recently received _______________ as a National Treasure. (recognise) 8. Tourists like to visit _______________ monuments such as Ho Chi Minh Mausoleum and the Temple of Literature. (history) VI. There is one mistake in each sentence. Underline and correct the mistake. 1. Khue Van Pavilion is regarded by the symbol of Ha Noi. 2. Today, the Temple was considered one of the most popular tourist attractions. 3. I haven’t ever been to Hanoi before. 4. The students were not interested in history because it was bored. 5. Tourists should add the Temple of Literature to their visit list in Hanoi. 6. You’d better to take your raincoat because it’s going to rain. 7. The Doctors’ stone tablets was first erected by King Le Thanh Tong. 8. The Imperial City of Hue was finally complete under the reign of King Minh Mang. VII. Match the questions with the answers. 1. Where would you like to go on your vacation? 2. What should I bring for the trip to Sa Pa? 3. Where is the Temple of Literature located? 4. When was the Doctors’ Stone tablets recognised by UNESCO? 5. What is the Imperial Academy? 6. Where is Khue Van Pavilion? 7. Who established the Imperial Academy? 8. How long did the students of the Imperial Academy study? a. To the south of the Imperial Citadel of Thang Long. b. In 2010. c. PhuQuoc Island. d. You’d better take warm clothes. e. Emperor Ly Nhan Tong. f. It’s the first university in Vietnam. g. For three years. h. It’s in the second courtyard.
Giai phương trình sau ''8(x+1/x^2)+4(x^2+1/x^2)-4(x^2+1/x^2)(x+1/x)^2=(x+4)^2'' mọi người giúp mik với
giúp cho em câu nàyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
j tạo công ăn việc làm cho mn. ^^ IX. Choose the word which best fits each gap. The first Glastonbury Festival took place In 1970 and was (1) _______ by Michael Eavis, who still runs the festival now (2) _______ his farm in Somerset in the south-west of England. Michael charged people just £1 to enter, and the ticket included free milk from the farm. Only 1,500 people attended on that occasion, (3) _______ this number has grown exponentially since then. In 2011, there were approximately 100 times (4) _______ people in the crowd and tickets, which cost £195 each, (5) _______ out within 4 hours. The festival takes place almost every year in the last weekend of June and lasts for three days. Although it is best known for contemporary music, Glastonbury is host to other (6) _______ arts such as dance, comedy and theatre. 1. a. organise b. organising c. organised d. organization 2. a. on b. in c. at d. from 3. a. so b. but c. or d. while 4. a. many b. much c. more d. most 5. a. took b. sold c. bought d. worked 6. a. performing b. creative c. decorative d. academic X. Read the text carefully, then decide whether the following statements are true (T) orfalse (F). Famously being one of Vietnam’sseven UNESCO World Heritage Sites, the ImperialCity of Hue has long been a must-see attraction for tourists. The Imperial City of Hue was actually a walled fortress and palace belonged to the ancient city of Hue which was a capital city of the Nguyen Dynasty – Vietnam’s last royal dynasty for 140 years. The grandeur architecture was planned to be built in 1803 by Emperor Gia Long. During 27 years from 1805 to 1832, the Imperial City of Hue was finally completed under the reign of the Emperor Minh Mang, making it the most massive structure being built in the history of modern Vietnam. There are total of ten main majestic gates leading to the Imperial City of Hue, which can be divided into two main parts: The Citadel and The Forbidden City. The complex of the Emperor’s residence, gates, temples, and pagodas was severely damaged during the Vietnam War, and only 20 out of 148 buildings survived. 1. Hue used to be the capital of Vietnam. 2. The Imperial City of Hue was built in 1803 by Emperor Gia Long. 3. It took 27 years to complete the construction of the Imperial City of Hue. 4. The Imperial City of Hue includes two main parts: The Citadel and the Forbidden City., 5. Many relics in Hue Imperial City were badly damaged due to natural disasters. 6. The Imperial City of Hue was made a UNESCO World Heritage Site. XI. Write the second sentence so that it has the same meaning to the first one. 1. Be calm or you’ll make a wrong decision. → If 2. A great poet wrote these wonderful poems. → These wonderful poems 3. Jane didn’t go fishing yesterday because it rained heavily. → Because of 4. Khue Van pavilion is used as a symbol of Hanoi by Vietnamese people. → Vietnamese people 5. His idea is different from mine. → His idea is not 6. These Dong Ho paintings are more expensive than those modern paintings. → Those modern paintings are not 7. What is your favourite food? → What food 8. Chefs use these machines to mix the ingredients. → These machines
Cho điểm này dịch cho mình câu này Các ngôi sao trên bầu trời tỏa sáng lung linh
I. 1.The Nile river is slightly longer than the Amazon river. ->The Amazon rive ......................................................... 2.Watching Kitchen God is more interesting than watching music shows. ->It is better to ................................................................. 3.My city has some historic places.His city has more. ->His city has ...............................................................
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