giải hộ em bài tập này phần a,b ạ

Tìm X 2(x+2)^2-(2x-1)(x-2)=-13 (2x+1)^2-4(x+1)(x-3)=15 Làm nhanh giúp mình nha

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Hãy viết 1 đoạn văn khoảng 10 dòng trình bày tình cảm của mình đối với bà

1 + 3 + 5 + ... + ( 2x - 3 ) = 196 Nhanh nhé các tus

Viết 1 đoạn văn diễn dịch 10 câu nêu cảm nhận của em về cái hay của khổ thơ sau: Dân chài lưới làn da ngăm rám nắng, Cả thân hình nồng thở vị xa xăm; Chiếc thuyền im bến mỏi trở về nằm Nghe chất muối thấm dần trong thớ vỏ. Trong đoạn văn có sử dụng 1 câu ghép và 1 câu bị động

1, chọn từ phát âm khác A, traffic B, station C, plane D, pavement ( từ phát âm a ) A, mail B, captian C, railway D, sail ( từ phát âm a ) 2,Chọn từ có nghĩa khác nhất A, machine B, tourist C, manner D, action A, serious B, hilarious C, violent D, saesonal A, diverse B, special C, local D, serious A, motorbike B, advatage C, atmosphere D, generate A, culture B, party C, lucky D, enjoy ( làm hộ mk nhớ giải thk nha )

: Choose the word or phrase that best complete the sentence 1) If that hat costs much , I ……………a small one . A . would have bought B.will buy C.bought D.would buy. 2) If you …………more carefully ,you wouldn’t have had so many accidents. A. drive B.drove C.had driven D.driven 3) If I spoke English , my job …………………a lot easier. A.was B.were C.will be D.would be 4. If he …………….to London yesterday, he ………….his old friend A.went / would meet B.go / would meet C.had gone / would have met D.went / would have met 5.I will lend them some money if they …………….me . A.ask B.will ask C.asked D.had asked 6.If we had known who he was , we …………….him to speak at our meeting . A.would have invited B.have invited C.will invite D.would invite 7.My dog will bark if it …………….any strange sound. A.hear B.hears C.heard D.had heard. 8.If I ………….enough money ,I will buy a house. A.had B had had C.will have D.have 9.If you …………..away , I will send for a policeman. A.not go B.don’t go C.hadn’t gone D.didn’t go 10. If I ………in your place , I would accept Mr Anderson’s invitation . A.were B.am C.be D.was 11.What ………..we do if they don’t come tomorrow? A.would B.will C.did D.had 12.If I …………….you, I would tell the truth. A.is B.am C.were D.was 13.If I had enough time now , I ………..to my parents. A.would write B.write C.will write D.wrote 14.It’s too bad Helen isn’t here .If she ………..here , she ……..what to do. A.is / will know B.was / knows C.were / would know D.are / would have known 15.If she ………….late again , she will lose her job. A.come B.came C comes D.had come 16.I will let you know if I ………..out what’s happening . A.find B.finds C.found D.had found 17.If we …………….in a town , life would be better . A.live B.lived C.would live D.had lived 18.I’m sure he wouldn’t mind if we ……………early . A.arrive B.arriving C.arrived D.had arrived 19 .If I won the lottery , I …….you half the money . A.gave B.had given C.will give D.would give 20.It ………..be a pity if she married Fred. A.will B.would C.can D.may 21.If I’m free on Saturday , I …………..to the mountains. A.to go B.could go C.went D.can go 22.we …………….you if we have time . A.will phone B.would phone C.phoned D.had phoned 23.If I ………….you ,I would help them . A.am B will be C.were D.had been 24.I could have understood him if he ……………more slowly. A.speaks B.spoke C.had spoken D.would speak 25.If I had known that you were in hospital, I ……………..you. A.will visit B.would have visited C.visit D.don’t visit 26.I wouldn’t have believed it if I ………………it with my own eyes. A.had seen B.saw C.hadn’t seen D.didn’t see 27.What would you have done if the lift ………..struck between two floors at that time. A.had got B.got C.gets D.getting 28.If I …………that the traffic lights were red, I ………………….. A.had realized / would have stopped B. had realized / wouldn’t have stopped C.realized / would stop D.realize / will not stop 29. If we have some eggs ,I ……………you a cake . A.made B.makes C.will make D.would make 30.If you …………so busy , I would have shown you how to play . A.hadn’t been B.weren’t C.aren’t D.wouldn’t be .

II. Chọn đáp án đúng cho mỗi câu sau. 1. …………… sports do you play? a. How b. Who c. Which d. What’s 2/Would you like some milk ………..? A.to drink B.drinking C.drink D.drinks 3. He often …………….. his kite when he’s not busy. a. does b. plays c. goes d. flies 4. How ......................... kilos of beef does she want? a. many b. much c. any d. about 5. “Is that your father?” - “Yes, .........................” a. it is b. that is c. he is d. it’s 6. “Would you like some noodles, Lan?” - “No, .........................I’m full. Thanks.” a. I wouldn’t b. I don’t c. I’m not d. I don’t like 7………..is the first day of the week. A.Monday B.Friday C.Saturday D.Wednesday 8. Can I help you? - …………., please. I need a kilo of beef. a. Sorry b. Yes c. Can d. No 9. Minh …………… likes fish and beef. a. isn’t b. don’t c. doesn’t d. never 10. He goes to work six days a week. He ………………..…. goes to work. a. always b. usually c. often d. never 11. ............................ are you going to spend your summer vacation? a. Where b. Which c. What d. Who 12. Let’s ................................. some photos. a. to take b. takes c. taking d. take 13. Why don’t we go to the cinema tonight? a. Because we don’t like film b. That’s a good idea c. You are right d. Thank you very much 14. We are going to stay..................................... my uncle’s house. a. in b. at c. with d. on 15 ....................................to go for a walk? a. How about b. Would you like c. Why don’t d. Let’s 16. “How ..................... oranges would you like” - “A dozen, please. And ..................... tea.” a. much, some b. many, any c. much, any d. many, some 17. I don’t like vegetables but my sister ......................... a. do b. likes c. does d. would like 18. Ba ………….lunch at school. a. does b. has c. have d. eat 19. Last year, he…………… a house.My father …………….a new house now. a. build..has b. built...has c. built..having d. built..is having 20.Lan’s brother…………..volleyball now. a. playing b. plays c. is playing d. played

Cho 13 g bột Zn vào dung dịch chứa 0,15 mol Fe(NO3)2 và 0,1 mol Cu(NO3)2, khuấy đều cho đến khi sau phản ứng xảy ra hoàn toàn thu đc dd X và m gam chất rắn. Cho X tác dụng với lượng dư dd NaOH, thử được a gam kết tủa. Tính m, a Giúp mình với ạ