Bài 1: Phân tích đa thức thành nhân tử: a) 5x ² - 5xy - 7x + 7y b) ab - ac - b ² + bc c) 3x ³ - 12x d) x ² - 4 + ( x + 2 ) ² e) x ² - 25 + y ² - 2xy f) 36x ² - a ² + 10a - 25 Bài 2 : Phân tích đa thức thành nhân tử: a) x ² + x +2 b) 3x ² + 7x - 6 c) 8x ² - 23x - 3 d) -10x ² - 17x + 6 Bài 3: Tìm x, biết: a) x ³ - x ² - 25x + 25 = 0 b) 4x ³ - 8x ² - 9x + 18 = 0 Bài 4: Tìm x a) 3x ( x - 1 ) + x - 1 = 0 b) ( x - 2 ) ( x ² + 2x + 7 ) + 2 ( x ² - 4 ) - 5 ( x - 2 ) = 0 c) ( 2x - 1 ) ² - 25 = 0 d) x ³ + 27 + ( x + 3 ) ( x - 9 ) = 0

I. Supply the correct form of the verbs in brackets to complete the sentences. (10 pts) 1. The thief (catch)………………while he (try)……………….. to break into that house. 2. The buses (run)…………..along this route are all new. 3. When my grandfather was young, he often (go)…………… to work on foot. 4. Lan really enjoys (take)…………..photographs when she travels to the countryside. 5. The sun always (rise)………………….in the east. 6. I am too tired to walk home. I think I (get)………..a taxi. 7. Hurry up! The bus (come)……………and I (not /want)…………..to miss it. 8. I had my computer …………..(repair) by my close friend yesterday. 9. It is raining heavily and the wind is blowing hard. There ……………....(be) a tropical storm. 10. I (do)……………….all the housework. The flat is really clean now. II. Supply the correct form of the words in brackets. (10 pts) 1. Don’t spend much of your time playing video games because it can be……………(ADDICT) 2. The…………........have to cook rice in this contest. (PARTICIPATE) 3. Most people dislike him because he is…….......... (FRIEND) 4. Tuan ………..his friends to his house last Christmas Day. (INVITATION) 5. ……………., his mother died in a road accident. (FORTUNATE) 6. A fairy…………………changed Little Pea’s rags into beautiful clothes. (MAGIC) 7. Walking is a fun, easy and ………………activity, and people of all ages and ability can enjoy it. (EXPENSIVE) 8. ……………air is a big problem in the city. ( POLLUTE) 9. We have decided to interview the best six ………………for the job. (APPLY) 10. What’s the correct ………………..of this word? (PRONOUNCE)

E đang cần lắm ạ, cảm ơn nhiều . Ý số 3 ạ

Phân tích thành nhân tử: a) ab(a+b) - bc(b+c) + ac(a-c) b) a(b²+c²) + b(c²+a²) + c(a²+b²) + 2abc c) (a+b).(a²-b²) + (b+c).(b²-c²) + (c+a).(c²-a²) d) a³(b-c) + b³(c-a) +c³(a-b) e) a³(c-b²) + b³(a-c²) + c³(b-a²) + abc(abc-1)

Rút bớt câu hỏi lại mong các bạn trả lời 🎆🎆🎆🎆🎆🎆🎆

Giúp mik đi Mik cần gấp, mik vote 5s vho Cảm ơn

Giúp e với ạ, chân thành cảm ơn ạ

khai triển hằng đẳng thức (x+3)^2= (2x-3)^2 9x+4)^3 (x-1)^3 x^3+8= x^3-27= cần gấp

Giúp mình bài này với. Many of the UFO stories that we read about in the papers are based on the reports of people who have been on their own when they (36) ___ the event occurred, (37) ___ we only have word that what they saw really happened. (38) ___, when mystery lights appeared in the distance over the sea in Lincolnshire, the police, the Air Force, coast guards and a tanker out at sea managed to witness what occurred. It was 3.14 in the morning when police reported (39) ___ an unrecognizable red and green rotating light in the sky. It made no sound. At 3.31 am, the RAF confirmed that there were in fact two unidentified objects. At 7.08 am, it became known that a civil aircraft had also seen these strange lights. Several fascinating facts were revealed (40) ___ this investigation. (41) ___ man-made flying objects carry ‘transponders’ which (42) ___ them to be identified but these mystery objects had (43) ___. The crew of the (44) ___ tanker, who had the best view of the objects, recalled watching the lights for 4 or 5 hours and rejected the idea that they could have been (45) ___ by weather conditions, There was no storm in the area that would have prevented them from seeing clearly. So, were they really UFOs? You’ll have to make up your own mind! 36. a. speak b. talk c. tell d. say 37. a. unless b. so c. while d. if 38. a. Because b. Since c. However d. Despite 39. a. staring b. looking c. glancing d. seeing 40. a. within b. during c. for d. across 41. a. Whole b. Both c. All d. Entire 42. a. make b. let c. allow d. give 43. a. neither b. no one c. nothing d. none 44. a. near b. close c. next d. nearby 45. a. discovered b. caused c. developed d. noticed

Help me plis :))) mik hỏi nhiều thật sự