Đáp án:
Giải thích các bước giải:
d/ $a^6-a^4+2a^3+2a^2$$=a^4(a^2-1)+2a^2(a+1)$$=a^4(a-1)(a+1)+2a^2(a+1)$$=(a+1)(a^5-a^4+2a^2)$$=(a+1)(a^5+a^4-2a^4+2a^2)$$=(a+1)[a^4(a+1)-2a^2(a^2-1)]$$=(a+1)[a^4(a+1)-2a^2(a-1)(a+1)]$$=(a+1)(a+1)(a^4-2a^3+2a^2)$$=(a+1)^2.a^2(a^2-2a+2)$
e/ $(3x^2+3x+2)^2-(3x^2+3x-2)^2$$=(3x^2+3x+2-3x^2-3x+2)(3x^2+3x+2+3x^2+3x-2)$$=4.(6x^2+6x)$$=24x(x+1)$Chúc bạn học tốt !!
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1, The whole of my sister's class spent last weekend redecorating her flat ( HAD ) -> My sister.............................. 2, His charming manners deceived several people, including me ( TAKEN ) -> Several....................... 3, Flooding after a heavy storm was responsible for the damage to the bridge ( CAUSED ) -> The damage to the bridge .......................after a heavy storm 4, Apparently, they're planning on reouting the traffic to reduce congestion ( DRAWN ) -> Plans.........................reroute the traffic to reduce congestion 5, I wasn't expecting my colleagues to organise a farewell party on my last day at the company ( TAKEN ) -> I.........................when my colleagues organised a farewell party on my last day 6, The Minister's response really took the interviewer by surprise ( ABACK ) -> The interviewer was.............................. 7, The present cam as a complete surprise to me ( ABACK ) -> I was..................
giai cho minh bai 6 í a,b,c giai trong 15p ạ 7h minh di hok giup minh nhanh ạ
1. Put the forrect from of the vebs 1.What (your sister do )________in the evening? 2.How often (you play)________badminton 3.Where (they do)______now? 4.I often (listen)_________to music 5.She (brush)_______her teeth 3times a day 6.(he have)_________breatfast at be? 7.(you learn)________English on Monday? 8.(you learn)_________English on Monday 9.The students (do)_______theis homework at home 10.(the students do)________their homework at home? Giải giúp mìn mơn trước ạ
Mọi người làm giúp mình bài 1,2,3 với nhé mình hứa sẽ cho ctlhn và vote 5 sao
it's Sharon's birthday soon and she has .............................. her parents for a new racket A told B asked C spoken tại sao lại khoanh câu A vậy mọi người mọi người làm ơn giải thích kỹ vào giúp mình cái cảm ơn
Hết điểm rồi làm 8,9,10 đi mà.
hãy viết một đoạn văn khoảng 12 câu văn theo phép lập luận diễn dịch để làm rõ phẩm chất của vua Quang Trung.
11. Smoking isn't good for your heart. Drinking isn't good for your health. (neither ...nor) ........................................................................................................................................................... 12. Young people normally like only music but also sports. (both ...and) ........................................................................................................................................................... 13. The chickens haven’t been fed. The pigs haven’t been fed, either (neither ...nor) ........................................................................................................................................................... 14. Dan came from Thailand and Chow came from Thailand. (both ...and) ........................................................................................................................................................... 15. She carried me in her arms and she lulled me to sleep. (not only ... but also) ........................................................................................................................................................... 16. Mary went to London and Kate did, too. (both ...and) ........................................................................................................................................................... 17. You were mad. You were drunk. (either ...or) ........................................................................................................................................................... 18. My mother likes tea. And my father does, too. (both ...and) ........................................................................................................................................................... 19. Richard and John didn't keep her secret. (neither ...nor) ........................................................................................................................................................... 20. The underground is quick . It is also cheap. (not only ... but also) ........................................................................................................................................................... 21. You can find this book in the library or in a second-hand book shop (either ...or)
Mọi người làm giúp mình bài 1,2,3 với nhé. Mình hứa sẽ cho vote 5 sao và ctlhn. Cảm ơn mọi người
ảnh hơi mờ, mong mọi người nhận xét, mình cũng chưa vẽ xong nữa :v
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