Thu gọn đa thức (5x ²-3x ³+4x-1)(-2x ²+3-6x)

Bác Hồ ra đi tìm đường cứu nước năm nào

1 mảnh đất hình chữ nhật có diện tích bằng 450 m2.Biết chiều dài là150 m. a)tính chu vi b)Cứ 100m2 bằng 40kg thóc.Tính số thóc

Cho tam giác ABC, gọi Ax là tia đối của AC. Tia phân giác của góc BAx cắt đường thẳng BC tại M. CM: MB.MC - AB.AC = $AM^{2}$

1 mảnh đất hình chữ nhật có diện tích bằng 450 m2.Biết chiều dài là150 m. a)tính diện tích b)Cứ 100m2 bằng 30kg thóc.Tính số thóc

help me có cả lời giải thích thì càng tốt thanks

Viết một đoạn văn ngắn về một câu chuyện buồn ( Cho tham khảo mạng )

giúp mình gấp nhé !!! cảm ơn :3 đề bài : Exercise 1: Add tag questions to the following. 1. We should call Rita, _______________? A. should we B. shouldn’t we C. shall we D. should not we 2. Monkeys can’t sing, ______________? A. can they B. can it C. can’t they D. can’t it 3. These books aren’t yours, ____________? A. are these B. aren’t these C. are they D. aren’t they 4. That’s Bod’s, ____________? A. is that B. isn’t it C. isn’t that D. is it 5. No one died in the accident, ______________? A. did they B. didn’t they C. did he D. didn’t he 6. The air-hostess knows the time she has been here, ______________? A. does she B. isn’t it C. doesn’t she D. did she 7. This is the second time she’s been here, ______________? A. isn’t this B. isn’t it C. has she D. hasn’t she 8. They must do as they are told, ________________? A. mustn’t they B. must they C. are they D. aren’t they 9. He hardly has anything nowadays, _________________? A. hasn’t she B. has he C. doesn’t he D. does she 10. You’ve never been in Italy, _________________? A. have you B. haven’t you C. been you D. had you 11. Sally turned her report, ________________? A. didn’t she B. did she C. hadn’t she D. didn’t she 12. He arrived late, _______? A. didn’t he B. did he C. hadn’t he D. didn’t he 13.Andrew isn’t sleeping, _______? A . is he B. isn’t he C.was he D.wasn’t he 14. You have a ticket to the game, _______________? A. have you B. don’t you C. haven’t you D. do you 15. Tom knows Alice, _____________? A. doesn’t he B. is he C. does he D. isn’t he 16. Come into the kitchen, _____________? A. do you B. will you C. won’t you D. B and C 17. Everybody likes beauty, ___________________? A. doesn’t he B. do they C. don’t they D. does he 18. Peter never comes to class late, ________________? A. doesn’t he B. doesn’t Peter C. does he D. does Peter 19. I’m going to see my grandparents in HCM City next week, _______________? A. aren’t I B. am I not C. are you D. A and B 20. Your baby is very lovely, ______________? A. is he B. isn’t he C. is it D. isn’t it

2x * 8 = 32 help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Nhờ năng động, sáng tạo, năm 12 tuổi, Thomas Edison đã A. Được mọi người học giỏi B. Trở thành nhà phát minh vĩ đại C. Cứu sống mẹ mình D. Sáng chế ra đèn điện