ai giúp em bài 2c với ạ em đánh 5 sao lun s4

Giải hộ mình ạ cảm ơn mọi người

: Cho hai đa thức: M(x) = 2x(x – 3) – 5(x – 2) + 3x^3 N(x) = - x(x + 1) – ( 3x – 4) + x^2(2x-3) (2x – 3) a) Thu gọn các đa thức trên. b) Tính : P(x) = 2 M(x) + N(x) . c) Xét xem x = -1 có là nghiệm của Q(x) = M(x) – N(x) không ?

Tổ hợp, chỉnh hợp: Cho $X=\{1;2;3;4;5;6;7;8;9\}$. Có bao nhiêu số tự nhiên gồm $6$ chữ số được lấy từ $X$ mà tổng các chữ số là một số lẻ? (Đề bài không nói là các chữ số khác nhau đâu nhé, muốn cho câu này 100 điểm lắm nhưng ko được)

HRYTYTY5ETYTYTYTYTYTYTYTYTYTYTYTY6 ai giúp mình kèm id free fire mình tặng kc

Làm giúp mk nha . Có 1 câu thôi

1. “Why don’t you put a better lock on the door, Barry?”, said John John suggested......................................................................... 2. Although both his legs were broken in the crash, he managed to get out of the car before it exploded.  Despite his ............................................................................... 3. I haven’t eaten this kind of food before. This is the first......................................................................... 4. After fighting the fire for twelve hours, the firemen succeeded in putting it out. The firemen managed.............................................................. 5. The architect has drawn plans for an extension to the house.  Plans ........................................................................................ 6. In Stratford-on-Avon, we saw Shakespeare’s birthplace We saw the house.................................................................... 7. It isn’t necessary for you to finish by Saturday  Y ou .......................................................................................... 8. “How many survivors are there?” asked the journalist The journalist........................................................................... 9. It was such rotten meat that it had to be thrown away The meat was........................................................................... 10. It is essential that Professor Van Helsing is met at the airport. Professor Van Helsing............................................................. 11. You can’t visit the United States unless you get a visa.  If .............................................................................................. 12. “Can I borrow your typewriter, Janet?” asked Peter.  Peter asked if ........................................................................... 13. She Started working as a secretary five years ago. She has..................................................................................... 14. My French friend finds driving on the left difficult. My French friend isn’t............................................................. 15. They Think the owner of the house is abroad. The owner................................................................................ 16. We didn’t go on holiday because we didn’t have enough money. If we......................................................................................... 17. The children couldn’t go swimming because the sea was very rough.  The sea was too ....................................................................... 18. What a pity you failed your driving test!  I wish ....................................................................................... 19. The mechanic serviced my car last week.  I ................................................................................................ 20. I’m always nervous when I travel by air.  Traveling .................................................................................

Giúp em câu b và c ạ. Em cảm ơn

Calli : "Lag vô tận" Tone j cx đc nhưng mà ko đc tone đen Xấu= bc +1 sao Tradi/digi ( ưu tiên tradi) NL: Mới on hoidap kiểu :D ( trong ảnh)

B. Read the passage carefully, then choose the correct answers. Having a best friend to confide in can bring a positive effect on our emotional health. An evening out with the closest friend may be the best guarantee of a good time. In fact, our best friend can prevent us from developing serious psychological problems such as depression and anxiety. Best friendship evolves with time - we cannot go out and pick our best friend. We become friends with people who share common interests – at school or through hobbies, for example. Best friends have usually known each other for years and stuck together through good and bad times. If you haven't got one, perhaps you are being too distant from people, or focusing too much on your work. 41. A best friend can ______. a. give us a healthy life b. go out with us in the evening c. spend much time finding d. share joy and sadness with us 42. Close friends need to ______. a. study at the same school b. have the same interests c. pursue the same hobbies d. spend time together 43. According to the passage, ______. a. it takes a lot of time to make close friendships b. we can go out and choose a good friend easily c. best friends have good and bad times d. It’s very difficult to make lasting friendships 44. The word 'one' in the last paragraph refers to ______. a. good time b. bad time c. a friendship d. a close friend 45. Which of the following sentences is not mentioned? a. We often have satisfaction being with a close friend. b. the ties of close friendship will never be broken. c. An unsociable person may not have a close friend. d. Friendships need time to develop