Bài 1: Tính hóa trị của : a. C trong CO b. Fe trong FeCl3 c. Cl trong AlCl3 d. S trong SO2 e. M trong MxOy

chỉ cần trl thôi, kh cần ghi hết nguyên câu đâu nhé

Calli bảng chữ cái thường tiếng việt của calligraphy bằng app

I. Choose the underlined word or phrase (marked A, B, C or D) in each sentence that needs correcting. 1. The children are playing boarding games, and their mother is arranging flowers. A B C D 2. One of his father's favourite hobbies is playing horse-riding, and he just practises it A B C twice a month. D 3. He started learning how to play the guitar on his elder brother. A B C D 4.Your favourite football match will begin at 3 p.m., so you should arrive there A B C soon to get a good seat. D 5. She will attend the judo class next month because she intends to have a long A B C vacation in Ho Chi Minh City. D 6. He loves to listen to classical music, but he spends a little time doing it. A B C D 7. She didn't enjoy the party very much because she didn't like music and A B C to dance there. D 8. She’s 18 and she’s France. She lives in a village near Toulouse. She studies A B C engineering at university. D 9. She has a short black hair and very dark eyes. She is intelligent and funny, but A B C sometimes she’s a bit sad too. D 10. She loves music and she likes writing songs. She can plays the guitar very well and A B C she has a beautiful voice. D II. There is one mistake in each sentence. Underline and correct the mistake. Sentences Correction 1. Nam is my classmates. He watches TV every night. 2. I think collecting stamps are interesting. 3. My dad cooks very good. He loves preparing meals for our family. 4. I enjoy to ride my bike to school. 5. We usually go in a small lake out of the city at weekends. 6. Do you still play football next year? 7. We like doing fishing because it is relaxing. 8. Do you think bird-watching interesting? 9. I think playing volleyball interest because it is a team game 10. In my opinion, more people played monopoly in the future. ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________

Bài 6: 1) 3x2(2x3 – x + 5) 2) (4xy + 3y – 5x)x2y - 2 - 3) (3x2y – 6xy + 9x)(- 3 4 xy) 4) - 3 1 xz(- 9xy + 15yz) + 3x2 (2yz2 – yz) 5) (x3 + 5x2 – 2x + 1)(x – 7) 6) (2x2 – 3xy + y2)(x + y) 7) (x – 2)(x2 – 5x + 1) – x(x2 + 11) 8) [(x2 – 2xy + 2y2)(x + 2y) - (x2 + 4y2)(x – y)] 2xy 9) -3ab.(a2 - 3b) 10) (x2 – 2xy + y2 )(x - 2y) 11) (x + y + z)(x – y + z) 12) 12a2b(a - b)(a + b) 13) (2x2 - 3x + 5)(x2 - 8x + 2) giúp mình nhanh nhé, mình sẽ vote 5 sao

Calli: Bảnh này không gáy bạn ơi :)

Bài 1:Tìm x (x-2)(2x+3)=0 Bài 2:phân tích đa thức thành nhan tử 7x-7y+x^2-y^2

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Đề là xem hình vẽ hãy nêu tên các cặp góc so le trog,đồng vị,trog cùng phía lm 2 cặp luôn nghen

Gạch dưới các tiếng có chứa nguyên âm đôi trong câu thơ sau: Có nơi đâu đẹp tuyệt vời Như sông, như núi, như người Việt Nam.