Rút gọn biểu thức a, M= $(2a + b)^{2}$ - $(b - 2a)^{2}$ b, N= $(3a + 2)^{2}$ + 2(2 + 3a) . (1 - 2b) + $(2b - 1)^{2}$

although he has a physical handicap, he has become a successful business man -> despite....

nhanh lên hộ m nha trong vòng 10p m sẽ cho 5 sao ạ

giúp mình với mn 1.Rút gọn biểu thức a)10-√3-√39-12√3 b) $\frac{6}{√7+1}$- $\frac{3}{√7-2}$+ $\frac{18}{√7+5}$ c) ($\frac{√6-√3}{1-√2}$ + $\frac{√5-√15}{√3-1}$) $\frac{1}{√3-√5}$ Lưu ý:12√3 nằm trong √39 nha

dúp mik nhanh nhé ko lm tắt nha

Giữa mình vpiws mình đang cần gấp

Đề: Bức tranh Đông Hồ “ Ếch đi học” có chiều rộng x(cm), chiều dài hơn chiều rộng 30 cm, diện tích là 8611. Tính độ dài các cạnh của bức tranh.

Câu 11 Although/Hoa/tired,/she/help/brother/homework A Although Hoa is tired, she helped her brother with his homework. B Although Hoa was tired, she helped her brother his homework. C Although Hoa was tired but she helped her brother with his homework. D Although Hoa was tired, she helped her brother with his homework. Câu 12 Read the following passage, and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions Britain will soon ban smoking in cars with children. Britain’s government wants (23)…………………. the harm cigarette smoke does to children. New laws will cut the chances of children passive smoking. This is when someone breathers in the …………………. from other people’s cigarettes. Many studies say passive smoking can almost be as …………………. as actually smoking a cigarette. The British government says that it has looked at research pointing out that children who sit in smoke-filled cars have …………………. problems. It in particularly bad in cars because there is so little space, so the car fills with smoke very quickly. Not everyone agrees with the new law. Some lawmakers argue that it takes away the freedom for people to smoke in their own car. However, Britain’s health minister states that the health of children is more …………………. than the freedom to smoke. A to reduce B reduce C reducing D to reducing Câu 13 Mark the letter A, B, C, or D to indicate the underlined part that needs correcting in each of the following questions “Even though the extremely bad weather in the mountains, the climbers decided not to cancel their climb.” A not to cancel B Even though C climb D extremely Câu 14 Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks. In the last 50 years, the media influence has grown widely with the advance of technology. First was the telegraph, then the newspaper, the radio, the television and now is the Internet. We live in a society that depends on information and communication to keep moving. What we need to be aware is that most of our decisions, beliefs and values are based on what we know for a fact, our assumptions and our own experience. In our work we usually know what we have to do based on our experience and professional knowledge. However, in our daily lives, we rely on the media to get the facts and figures about what is important and what we should be up to date with. As a result, we have to put our trust on the media as an authority to give us the needed information. However, the influence of mass media on our life, work and society is so big that we should know how it really works to select the right pieces of information. According to the passage, what is the most recent type of mass media? A the Internet B TV C telegraph D newspaper Câu 15 My father asked us _____________ too much time playing computer games. A didn’t spend B not to spend C to not spent D not to spending Câu 16 He spent an hour revising what he had already learnt for the test. A It took him an hour to revising what he had already learnt for the test. B It took him an hour revise what he had already learnt for the test. C It took him an hour revising what he had already learnt for the test. D It took him an hour to revise what he had already learnt for the test. Câu 17 The device was so expensive that I didn’t buy it. A The device was too expensive for me to buy. B The device was too expensive to buy. C The device was expensive enough for me to buy. D The device was too expensive for me to buy it. Câu 18 We played very well. ___________, we lost the match. A Moreover B Therefore C And D However Câu 19 If I knew how to run the machine, I ____________ you. A helped B would help C will help D help Câu 20 Mark the letter A, B, C, D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. “The guests at the Japanese Embassy reception enjoyed the raw fish very much but refused to eat it.” A rotten B stale C uncooked D fresh

Vẽ mầm rất zui :D NL: Hai xác thực về liên tiếp :D

có tam giác ABC có góc A bằng 90 độ AH vuông với BC BH=1 AC=2 căn 5