Thu gọn : C= ( 2x+y) ( 2z +y) + (x-y) (y-2) D= 3x (x-2y) -7/6 y (y-6x) E= 2x (10x^2 -5x-2) -5x (4x^2 -2x -1) F= a (a+1/3) – ( 1/5a +8) (5a -11) G= x^3 -30x^2 -31x +1 H= x^5 -15x^4 +16x^3 -29x^2 +13x K= x^14 -10x^13 +10x^12 -10x^11+…+10x^2 -10x

giúp mk vs ạ tối nay mk nộp rồi. xin lõi vì ít điểm quá ạ

1: Your bike needs to repair , it broken down. 2. I’m used to eat a lot of sweets but I don’t any more. 3: The telephone is a very useful invent. 4: They are very boring because they don’t know what to do. 5: I’d like going out for dinner, but I don’t feel like eating out tonight. 6.Lan wishes that she can go to Singapore to visit her pen pal. 7 My brother didn’t wear that uniform since he left school. 8. Nam asked Mai what can he do to help her. tìm lỗi sai và sửa

Những chất nào thủy phân trong môi trường axit? Những chất tác dụng được với dd Cu(OH)2? Mọi người liệt kê giúp mình với ạ! (Những chất liên quan đến lớp 12 thôi) Thanks

III. Choose the best answer a, b, c, or d to complete the sentence. 1. His Jacket is almost the same colour __________ mine. a. with b. as c. to d. for 2. Water puppetry began __________ the 11th century. a.in b. on c.at d.from 3. The __________ is rather older now; however, his acting ability has never been better. a. composer b. actress c.artist d. actor 4. Janna can’t play the piano, and Carol can’t play it __________. a. either b. too c.neither d. as well 5. Juan and Patricia are not the same height Juan is __________ Patricia. a. as tall as b. not as tall as c. more tall than d. not tall than 6. Saxophones are used mainly for __________ jazz music. a. composing b. taking c.playing d. writing 7. I went to the 3D __________ last weekend. The paintings were excellent! a. movie theater b. concert hall c. opera house d.art museum 8. __________ I’m not a fan of country music, I thoroughly enjoyed his lively performance. a. Although b. Because c.As d. However 9. __________ does a water puppet show take place? ~ In a pool. a. What b. When c.How d. Where 10. Which is the national anthem of Vietnam? a. Tieu Doan 307 b.Chien si Viet Nam c. TienQuanCa d. Tienve Ha Noi

IV. Write the correct tense or form of the verbs in brackets. 1. My home town ________________ (change) a lot in the recent years. 2. Please, stop! You ________________(drive) so fast. 3. The paintings ________________(make) on Dzo paper with natural colours. 4. Yesterday I ________________(go) to the centre and ________________(see) an exhibition. 5. As soon as I ________________(finish) painting my room, I’ll paint the kitchen. 6. I ________________(be) to England three times so far. 7. The children ________________ (not be) at home last Sunday. 8. Do you think we ________________ (write) a test tomorrow? 9. Are you interested in ________________(do) community service? 10. Some teenage girls volunteered ________________ (work) at the local hospital.

điền 1 đại từ vào chỗ trống: who/whom/whose/which/that 1 the boy _____ are playing in the garden is my cousins 2 the finally married the girl _____ he loved 3 the flowers _____ my friend gave me have withered 4 Mary is the girl ______ bicycle was stolen yesterday 5 the vegestables ______ Mr.Green sells are not fresh

Mấy sư huynh giúp em giải với ! Giải end nhé bài thi em cám ơn ! Thanks for giải !

Tìm ƯCLN của hai số sau: A= 2⁶³-1 và B=2⁷⁷-1

mn giúp mình với, mấy phút nữa mình phải học rồi, mỗi người 1 câu cũng đc