(x-2)^2-(x-3)(x-1) ,............

n* = 12 ai giải gấp giúp em câu này với ạ

Trong bình đốt khí người ta dung tia lửa điện để đốt một hỗn hợp gồm 32 cm3 khí hiđro và 30 cm3 khí oxi. a) Sau phản ứng còn thừa khí nào không? Thừa bao nhiêu cm3 ? b) Tính thể tích và khối lượng hơi nước thu được? (Biết các thể tích khí và hơi đo ở đktc).

1. when/a/are/a bike/ motorbike./wear/or/on/you/helmet/a .............................................................................................................................................................................. 2. elder/most of the land/the/parents./and/brother/left/by/the/all/his/got/money .............................................................................................................................................................................. 3. life/quieter,/the city/which/or/one/countryside?/in/is/the/life/in .............................................................................................................................................................................. 4. yesterday/went/because/dentist/to/Peter/he/toothache./had/the/a .............................................................................................................................................................................. 5.English/is/enjoy/necessary/they/studies./because/their/learning/it/for

giúp mình tính 3 này vs ạ, đang cần gấp mong mọi người giúp đỡ

> a - b + (x + y)(z - x) > Nếu chuyển dấu [+] thành [-] giữa {b} và {(x+y)} thì đổi dấu trong ngoặc như thế nào ạ

2. ........here.(shout).......quietly(talk) 3.........here.(run)..........slowly.(walk) 4.........in here.(come)........... the other door.(use) 5.My hand very dirty.(them) ................................................ 6.It's mum birthday at the weekend.( to buy her a present) ............................................... 7.The radio is really loud.(it off) ................................................ 8. I am really tired

Bài 1:Rút gọn biểu thức: mong nhận đc đáp án sơm nhất từ các bn <3

1. There are a lot of silk_____ such as scarves, ties and dresses in our shop. (PRODUCE) 2. Bat Trang is one of the most famous _____ craft villages in Ha Noi. (TRADITION) 3. We should read this leaflet to see what _____ are organized during the festival. (ACT) 4. They showed me a marble sculpture which was ____________ made by hand. (SKILL) 5. Last week we had a ______trip to an ancient village on the outskirts of Ha Noi. (MEMORY) 6. Obviously, our handicrafts are in _____ with those of other villages. (COMPETE) 7. Do you know that ______ have to follow 15 stages to make a conical hat?(ART) 8. My grandfather has devoted himself to many _______ events in our community. (CULTURE) 9. You should spend at least one week to visit the tourist______ in this city.(ATTRACT) 10. We are impressed by a wide ______ of lacquerwares in the showroom.(VARY) Giúp mình vs

Giải giúp mình hai bài này với cảm ơn ạ