Phân tích đa thức thành nhân tử a/ $9x^{2}$- $4x^{2}$$y^{2}$+$12xy$-$6x$-$8$ b/$x^{3}$+ $3x^{2}$$y$- $4y^{3}$

Giúp mik nha (nếu đc nêu từ khóa, cách dùng và thì luôn nha)

với mọi x thuộc z ta có a)N^3-19N LÀM THEO CÁCH LỚP 8 NHANH LENNNNNNNNNNNNNNNN

Rewrite:It took him 2 hours to water the trees(spent)->... They have learnt English from 4 years ->They started...

1. You have to finish this work on time.  This work ......................................................................................................................... 2. Must the test be finished before ten?  Must they.......................................................................................................................... 3. How long is it since they last saw that film?  When did.......................................................................................................................... 4. When was this car bought? (turn into active)  When ................................................................................................................................

Việc phát huy dân chủ và thực hiện tốt kỉ luật ở trường , lớp có ý nghĩa như thế nào đối với bản thân em ?

giai giup mk với dang cần gấp 4 giờ 40 là xong nha

Cho tam giác ABC. G là trọng tâm tam giác ABC. M, N là các điểm xác định bởi `3vec{MA}+4vec{MB}=vec{0}, vec{CN}=1/2vec{BC}.` a) CM: M, N, G thẳng hàng b) Tính tỉ số diện tích mà MN chia tam giác ABC

1. A. bread B. reading C. seat D. meat 2. A. school B. chess C. teaching D. chalk 3. A. photo B. going C. home D. brother 4. A. volleyball B. cold C. open D. telephone 5. A. after B. farm C. walk D. class 6. A. computer B. lunch C. sun D. funny

1. Find the word which has a different stress pattern from that of the others. A. musician B. poetic C. fashion D. minority 2. Find the word which has a different stress pattern from that of the others. A. music B. poem C. symbol D. unique 3. Find the word which has the underlined part pronounced differently from that of the others. A. clothes B. correspondences C. conveniences D. suitcases 4. Find the word which has the underlined part pronounced differently from that of the others. A. design B. stripe C. addition D. describe 5. Workers like wearing jeans because they don't _______ easily. A. make off B. wear off C. wear out D. make out. 6. The _______ of jeans stopped growing in the 1990s. A. sell B. sold C. selling D. sale 7. Nowadays, many Vietnamese women prefer to wear modern _______ at work. A. cloth B. cloths C. clothing D. clothes 8. Her jacket is made _______ very soft leather. A. by B. of C. with D. in 9. Could you help me, please? - ________. A. No problem B. No, thank you C. I need a favor D. That’s great 10. Wearing uniforms encourages students to be proud _______ their school. A. with B. at C. for D. of 11. “What _______ is this shirt made of? A. material B. thing C. object D. container 12. My friend is one of the famous fashion _______ nowadays. A. actors B. designers C. singers D. writers 13. The word “jeans” comes from a kind of _______ that was made in Europe. A. substance B. form C. element D. material 14. In the 1980s, jeans finally became high fashion clothing. _______ of jeans went up and up. A. sales B. buying C. selling D. making