bài 1 chứng minh biểu thức sau ko thuộc vào x và y a) A= x(2x+1) - x^2(x + 2) + ( x^3 - x + 3 ) b) B= x(x^3 + 2x^2 - 3x + 2 ) - ( x^2 + 2x )x^2 + 3x( x- 1 ) + x-12 c) C=3xy^2( 4x^2 -2y ) - 6y(2x^3y + 1 ) + 6( xy^3 + y - 3 ) d) D= 3x( x- 5y) + ( y -5x)(-3y) - 1 - 3( x^2 - y ^2 )

Help Bai 9 and 10 nhaaaa

Calli: Viện dưỡng lão Tone: hồng Có trang trí NL : nếu thoát nhóm ra mà nick bị khóa ý thì sau ai lm trưởng nhóm ạ

31. Your car is different _____ mine. A. to B. in C. from D. for 32. I found history very _____. A. amusing B. amused C. amuse D. to amuse 33. Her _____ include swimming and reading. A. interests B. interesting C. interested D. interest 34. Great Opera _____ of the world can be heard at the Sydney Opera House. A. sing B. singings C. singers D. to sing 35. English is the _____ language on one- fifth of the land area of the world. A. office B. official C. officer D. officially 36. English tends towards _____. A. simple B. simplicity C. simplier D. simply 37. He looks _____ today than yesterday. A. good B. well C. better D. goodly 38. There is a _____ difference between the north and the south. A. region B. regional C. regionally D. regioner 39. He went to a seaside resort because he was keen on _____. A. windsurf B. windsurfing C. to windsurf D. to windsurfing 40. The teacher told the boys to stop _____. A. to make B. played C. playing D. being played 41. Mark Twain is a famous _____. A. American writer B. American playwright C. English writer D. English playwright 42. He used _____ next to me in class. A. to sit B. sit C. to sitting D. to sat

II. Choose the best answer to complete each of the following sentences. 1. She ______ working with children. A. would like B. adores C. would love D. wants 2. Speech is the fastest method of ______ between people. A. communicate B. communicates C. communicated D. communication 3. Do you mind ______? I’m feeling pretty tired. A. driving B. drives C. drove D. driven 4. I had a really ______ dream last night. A. important B. fantastic C. weird D. light 5. The technology has enabled development of an online ______ library. A. virtual B. real C. funny D. fast 6. I like ______ up as soon as I finish eating. A. wash B. to wash C. washes D. washed 7. I’m trying ______ Chinese though it’s very difficult. A. learn B. learning C. learnt D. to learn 8. We should stop ______ because it is harmful to our health. A. smoke B. smokes C. smoking D. to smoke 9. John isn’t here. Try ______ his home number. A. phoning B. to phone C. phones D. phoned 10. Did you remember ______ that letter for me? A. post B. to post C. posting D. posted

Tạo logo chữ '' Trang'' Đẹp vào nha 40 đ của tui đó

Vẽ mầm NL: Chỉ có thể là LỬA CHÙA, số dislike còn nhiều hơn cả mv của Zách

Calli : ghét P/s:mn ghét nhất thể loại nhà hàng xóm nào

gấp gấp tìm x giup em: X+19x18+10= 20

Calli : '' Sóng gió '' Y/c : Có kí đầy đủ Ko vi phạm luật HoiDap Ko vẽ trên giấy kẻ Chụp rõ ràng ;-; Tone màu tùy Có thể vẽ trên app ! P/s : ~~~~ Ngoài kia bao la sóng gió, đừng quên tên anh Đừng quên đôi môi, ánh mắt hay giọng nói trầm lặng. Vì người đàn ông em yêu mạnh mẽ Vẫn luôn cười mỗi khi đau Nếu yêu thêm người sau thì xin em cũng đừng quên tên anh ~~~