Đáp án:Nếu bài là phân tích đa thức thành nhân tử thì làm như bên dưới.
Giải thích các bước giải:
`-4sqrtx-xsqrtx(x>=0)`
`=-(xsqrtx+4sqrtx)`
`=-sqrtx(x+4).`
Đáp án: `-4sqrtx-xsqrtx=-sqrtx(4+x)` với `x>=0`
ĐKXĐ: `x>=0`
`-4sqrtx-xsqrtx`
`=(-4-x)sqrtx`
`=-sqrtx(4+x)`
Vậy `-4sqrtx-xsqrtx=-sqrtx(4+x)` với `x>=0`
I. Choose the word whose underlined part is pronounced differently from others by circling the corresponding letter A, B, C or D. (1.2 marks) 1. A. stopped B. looked C. missed D. enjoyed 2. A. character B. children C. teacher D. change 3. A. meat B. steak C. eat D. please III. Give the correct form of the words given to complete each of the following sentences. Write your answers in the gaps provided. (0.8 mark) 1. Ha Long bay is known as the most__________destination of Vietnam. (ATTRACT) 2. Adela can write almost like a native speaker, but her _________is not good. (PRONOUNCE) IV. Choose the word or phrase that need correction in each of the following sentences by circling the corresponding letter A, B, C or D. (0,8 mark) 1. English are the dominant language in the scientific research. A. are B. dominant C. in D. scientific 2. I had an wonderful trip on my birthday last year. A. I B. an C. on D. birthday V. Read the text and choose the best answer to the following questions by circling the corresponding letter A, B, C or D. (2.0 mark) Sydney is Australia's most exciting city. The history of Australia begins here. In 1788 Captain Arthur Philips arrived in Sydney with 11 ships and 1624 passengers from Britain (including 770 prisoners). Today there are about 3.6 million people in Sydney. It is the biggest city in Australia, the busiest port in the South Pacific and one of the most beautiful cities in the world. In Sydney, the buildings are higher, the colours are brighter and the nightlife is more exoiting. There are over 20 excellent beaches close to Sydney and its warm climate and cool winter have made its favourite city for immigrants from overseas. There are two things that make Sydney famous: its beautiful harbour, the Sydney Harbour Bridge, which was built in 1932 and the Sydney Opera House, which was opened in 1973. 1. According to the passage, where did Captain Arthur Philips arrive in 1788? A. South Pacific. B. Sydney Harbour Bridge. C. Sydney. D. Britain. 2. How many people are there in Sydney today? (NB) A. 1.624 million. B 3.6 million. C. 770 million. D. 1788 million. 3. The word “immigrants” in the text means________________. A. people who travel to a different country or place, often in order to find work B. people who have come to a different country in order to live there permanently C. people who have come to a different country in order to study D. people who have rights because of being born there 4. Which of the following statements is NOT true about Sydney? A. Sydney is not famous for its beautifol harbour. B. Sydney is one of the most beautiful cities in the world. C. Sydney is the busiest port in the South Pacific. D. Sydney is the most exciting city in Australia. 5. Which of the following should be the best title of the reading passage? A. Sydney's Opera House. B. The history of Sydney. C. An introduction of Sydney . D. Sydney's beaches and harbours. VI. Writing (2,0 marks) Complete the second sentence so that it has a similar meaning to the first one using suggested words. 1. The IELTS practice test book is interesting. I bought it two weeks ago. => The IELTS practice test book which................................ . 2. They will build a supermarket near the airport next year. => A supermarket.................................................................. . 3. I don't have enough time, so I do not go swimming every day. => If I.................................................................................... . Use the words / phrases provided to write meaningful sentences. 4. In spite/ his high salary/ he / not happy/ his job. ............................................................................................... 5. I/ spent/three hours/do/ homework/yesterday. ...............................................................................................
Nhờ các bạn giúp mik với ak, mik đang cần rất gấp
rút gọn và tính giá trị của các biểu thức sau
gấp gấpppp mọi người owiiiiii, làm càng nhiều càng tốt nhaaaa
Hòa tan 12,1g hỗn hợp gồm CuO, ZnO cần 100ml dung dịch HCl 3M a) tính % khối lượng oxit trong hỗn hợp ban đầu b) tính khối lượng dung dịch H2SO4 20% hòa tan hết hỗn hợp trên
a. 45 - 24.....17 + 10 24 + 35.....56 - 36 6 + 4.......7 + 2 b. 32 + 16......20 + 28 37 - 17......56 - 36 10 - 2........10 - 1
Viết đoạn văn theo cách trình bày quy nạp ( 8- 10 câu) để làm sáng tỏ câu chủ đề sau: tuổi trẻ có ước mơ -e cảm ơn, e cần ngắn thôi ạ-
an co 8000 dong hoa mua 2 quyen vo gia moi quyen vo la 1500 dong hoi an con lai bao nhieu tien? bai 5: 3dm 4cm....cm 5m 90cm....cm 6m 5dm.....cm 9m.....cm 7m 40cm...cm 4m 6cm.....cm 50dm....m 400cm....m bai 6: 3dm 4cm +40cm= 5m 90cm-43cm= 6m 5dm-50cm= 9m-500cm= 7m 40cm-740cm= 4m 6cm-46cm= 5dm 9cm-56cm= 400cm-40cm=
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You are going to read a passage about the advice to young people about to start work. Choose the most suitable sentence from the list A->E to complete the passage. A. who knows you well 3 D. young people to find a job5 B. If you are unlucky 1 E.2 which help you to do the job more successfully C. they may find that4 In these days of high unemployment, it is often difficult for (1)………………………... If they are lucky enough to be asked to go for an interview, (2)………………………….there are at least 20 other applicants for the job. If a company is thinking of offering you a job, they will ask you for at least one reference from either your previous employer or someone (3)……………………………. Before taking up your job, you may have to sign a contract. You will probably have to do some training,(4)……………………………. Once you have decided that this is your chosen career, you will then have to work hard to try and get promotion, which usually brings more responsibility and more money!(5)……………………………, you may be made redundant, and not be able to find another job. It is also a good idea to pay some money into a pension scheme, which will help you to look after yourself and your family when you are retired. Finally, good luck!
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