(9xy^2-6x^2y)(-3xy)+(6x^2y+2x^4):(2x^2) làm tính chia

vt bthức dưới dạng tổng 2 bình phương

cho tam giác ABC vuông tại A , đường cao AH biết AB=5 , HC=6 . Tính AC,AH,BH

Các bạn học sinh vào giúp mình giải toán với ạ

1. date/ is/ today/ what/ the/ ? 2. August/ is/ It/ 26th 3. Unit 2/ Let's/ at/ look 4. am/ I/ student/ a/ Le Hong Phong/ School/ at/ Primary 5. to/ Happy/ you/ birthday gift/ you/ for/ this/ is

Tính A = ( căn 6 + căn 2 ) ( căn 3 - 2 ) Căn của 2 + căn 3 B = ( 4 + căn 15 ) ( căn 10 - căn 6 ) Căn của 4 - căn 15

CM : A >= 0 `A = 8x^2 + y^2 + 11y^2 + 4xy - 12xz - 5yz`

Giúp mình vs mấy bn chỉ mình câu nào là vần nào lun nha cho mình cảm ơn

Nêu cảm nghĩ của em về vấn đề lời chào lời cảm ơn và lời xin lỗi

15. Jack________the news immediately. If you don't do it, I will A ought to be told B. ought be told C.ought tell D. ought to have told 16. The prisoner is thought__________ by climbing over the wall A. to escape B. has been escaped C. to have escaped D.had escaped 17. Tom has just had a telephone_________ in his room A. install B. installed C. to install D. installing 18. They recommended that a hotel__________on the edge of the lake. A. should be built B. must be built C. was built D. could be build 19. He dislikes______what to do. A. people tell him B. being told C. to be told D. they telling him 20. The music at the party was very loud and from far away can hear B. could hear C. can be heard D. could be heard