Cho tan giác ABC vuông tại A; AB = 12cm, AC = 16cm; tia phân giác AD, Đường cao AH. Tính HD, BH, HC

Phân tích thành nhân tử d) (3x+1)^2 -4(x-2)^2 e) 9(2x+3)^2 -4(x+1)^2 f) 4b^2c^2-(b^2+c^2-a^2)^2 g) (ax+by)^2 - (ay+bx)^2 h) (a^2+b^2-5)^2 -4(ab+2)^2 i) (4x^2-3x-18)^2 -(4x^2+3x)^2 k) 9(x+y-1)^2 -4(2x+3y+1)^2 l) -4x^2 +12xy-9y^2+25 m) x^2-2xy+y^2-4m^2+4mn-n^2

cách viết phân số trong Phần Mềm Word nha mn! tsk tsk tsk

Viết cali ;" lười học quá " AI vào tư vấn tâm ly cho em

17. She ‘doesn’t’ allow anyone ‘smoking’ ‘in’ her ‘own’ room. A B C D 18. ‘Changeable’ and ‘uncertain’ people are incapable ‘in’ ‘true’ friendship. A B C D 19. It ‘took’ ‘him’ two hours ‘flying’ ‘to’ Ha Noi. A B C D 20. While I ‘had’ ‘a’ bath, someone ‘knocked’ on ‘the’ door. A B C D giúp em tìm lỗi sai ạ em cảm ơn

Exercise 4: Use the word at the end of each sentence to form a new word that fits into the sentence. 1. The ………………… . in this place is absolutely terrible. I want my money back. (SERVE) 2. Could you help me make a ………………… . . I don't know which phone to buy. (DECIDE) 3. Even very good clothes are quite ………………… . in this shop (AFFORD). 4. There are no further ………………… . for applying for this job. (REQUIRE) 5. My mother had no idea that this vase was so ………………… . (VALUE). 6. Companies should always tell the ………………… . in their advertisements. (TRUE) 7. Credit cards are really ………………… . , but you have to be careful with them (USE) 8. I read a ………………… . of all the new mountain bikes. This one is the best. (COMPARE) 9. Before you get money from the bank you have to make a ………………… . about whether you can pay it back or not. (JUDGE) 10. He has been an ………………… . banker for ages (INVEST)

5. We might have robots ourmeals. A. Cook B. To cook C. Cooking D. To cooking 6. A hi-tech robot willhelpus children while we areaway. A. Look out B. Look at C. Look after D. Look in 7. I would like to have my housebythe .....so we can seethe beach from my window. A. mountains B. City C. Sea D. Countryside 8. We might have a TV to watch TV programmes fromspace. A. Wireless B. Remote C. Automatic D. Local 9. pencils and paper, every student will have a computer. A. By B. Instead of C. Instead D. at 10. The house will have a super smart TV tosendand theemails. A. Post B. Give C. Get D. buy

phân tích các đa thức sau thành nhân tử 5x3 +10x3+5x

Exercise 3: Use the word in brackets to form a new word that fits into the blank ! 1. What's the name of that ………………… . you were singing earlier (SING). 2. I started playing the piano , but I don't think I have much ………………… . talent (MUSIC) 3. My dad used to be really fit and he was in his college ………………… . team (ATHLETE) 4. When you were young did you ever play with other ……………in your neighbourhood (CHILD) 5. Alan wants to be an ………………… . but I don't think he's got much talent (ACT) 6. They have a wonderful ………………… . of stamps. (COLLECT) 7. You have to practice a lot if you want to work as a ………………… . (MUSIC) 8. My friend wants to become a ………………… . football player (PROFESSION) 9. Why are cats such ………………… . animals ? (PLAY) 10. Lots of people get ………………… . just from watching someone perform. (PLEASE) 11. There are many forms of ………………… . . You just have to find the right kind . (ENTERTAIN) 12. In his youth my dad was a ………………… . . He worked on a big ship for two years (SAIL)

Writing task: There is a fact that a number of parents now increasingly desire to send their children to study overseas. What are the reasons for this trend? You should write a passage of about 200-250 words on this topic. Các Đại Nhân giúp e vs ạ !