giải hộ mik 3 câu này theo phương pháp dùng hằng đẳng thức mình hứa sẽ cho 5 sao và ctlhn ạ ,mn giúp mik vs

Calli : Không giống nhau Y/c : Có tâm N/l : 😔😔😔

các văn bản vi phạm phương châm hội thoại mk cần gấp lắm ạ

II. Rewrite. 1. He hasn't written to his parents for 2 months now.  The last time ...... 2/ I've never been to Scotland before.  This is ........................................ 3/ He started learning French 3 years ago.  He has .......................... 4/ We haven't seen Ann for ages.  It's ............................................... 5/ I last saw him when I was a student.  I ...................................... 6. It / 5 years / since / I / visit / home village -> 7.The last time/ he / go / Da Lat / ten years ago. -> 8. He hasn't written to his parents for 2 months. It is ....... 9. I've never been to Scotland before.  This is ..................................... 10. I started learning English 5 years ago.  I've ............................. 11. The last time I saw him was in 1995.  I haven't ..................... 12. Linda's career as a television presenter began 4 years ago.  Linda has been ........................................................................... 13. It started to rain at two o'clock.  It has ....................................... 14. It is ages since I last saw you.  I haven't ......................................... 15. We last saw him when we were students.  We haven't .................... 16. She is the most beautiful girl I've ever met.  I've never........................ 17. He hasn't received news from home for two months.  The last time ....... 18. I’m sorry my friends are poor. I wish …………………………………………. 19. I speak English badly. I wish ………………………………………………………. 20. Last night I didn’t go to the party. I wish………………………………………………

Chứng minh các đẳng thức sau: a) √2 +√3+√4/√2+√3 +√6+√8 +4 =√2-1

Rút gọn a,1/3 - 2√2 + 2√3/2+√5 b,1/√5+√7 +1/1-√7 c,7/3-√2 -2/√2-1

mong m giúp mim bài này ko làm tắt và làm kiếm thức cao hơn

Mấy anh chị giải giúp em vs ạ. Em đang cần gấp ạ. Em cảm ơn

thuyết minh về cây trúc yêu cầu bài làm: lập dàn ý trong đó có sử dụng yếu tố miêu tả

Phân biệt: NaCl, Na2SO4, HCl, H2SO4, AgNO3