Tìm các nghiệm nguyên của pt: a, 15$x^{2}$ - 7$y^{2}$ = 2 b, $3^{x}$ + 7 = $y^{3}$ c, $2^{x}$ + 57 = $y^{2}$ d, $8^{x}$ - 37 = $y^{3}$

Câu này vs mọi người chắc easy, làm nhanh nhé

Viết ra vớ hoặc đánh máy, tùy ạ Nhanh với ạ

III. Put the verbs in correct form of conditional sentence type 1 or 2: 1. If the shop is open, I (buy) ____________________ a souvenir. 2. If you do your homework now, we (go) ____________________ to the cinema in the evening. 3. If we (order) ____________________ the book now, we will have it tomorrow. 4. If I had more money, I (buy)____________________ a bigger car. 5. If I (meet) ____________________ my favourite movie star, I would ask him for an autograph. 6. I (call) ____________________ you if I need your help. 7. I would go swimming if the weather (be) ____________________ better. 8. If he (have) ____________________ time tomorrow, we will meet the day after. 9. If we (go) ____________________ to London, we will visit the Tower. 10. If I were you, I (not/ know) ____________________ what to do. 11. If we don't order the tickets soon, there (not/ be) ____________________ any tickets left. 12. If she (miss) ____________________ the bus, she will not get here on time. 13. She (not/ say) ____________________ that if she were your friend. 14. If they go to Washington, they (see) ____________________ the White House. 15. He (help) ____________________ me if he knows the answer. 16. If she (have) ____________________ a hamster, she would call him Fred. 17. If he gave her a sweet, she (stop) ____________________ crying. 18. If he (arrive) ____________________ later, he will take a taxi. 19. Jane will let you in if I (not/ be) ____________________ here. 20. We would understand him if he (speak) ____________________ slowly. giúp mig với cả nhà ơi

5. Tìm các cặp số nguyên (x, y) thỏa mãn điều kiện sau: x(x -2) - (2 - x)y - 2(x- 2) = 3.

Phân tích đa thức thành nhân tử

29. There was a time when watching T.V really …………………family entertainment . A. were B. was C. had been D. is 30. Daniel ……………..the bus . It doesn’t run on Sundays . A. did not catch B. have not caught C. had not caught D. couldn’t have caught 31. We didn’t play well . We ……………..better . A. should have played B. should play C. have played D. have been playing 32. I think you ……………….pay to park here . I’ll just go and read that notice.A.will B. would C. must D. can 33. I think you should have that coat ……………….soon . A. cleaned B. being cleaned C. cleaning D. to clean 34. I’m feeling sick . I ………………so much chocolate last night . A. needn’t to eat B. did not eat C. mustn’t eat D. shouldn’t have eaten 35. I’m going on holiday on Saturday . This time next week I …….on a beach in the sea . A. will lie B. am lying C. will be lying D. should be lying 38. She ………………very angry when she knows this . A. shall be B. has been C. will have been D. will be 39. We …………a party last Saturday . It was great – we invited lots of people . A. have B. have had C. had D. had had 40. I was sad when I sold my car . I ……….….it for a very long time . A. am running B. were running C. had been running D. have been running 41. We were extremely tired at the end of the journey . We …….for more than 24 hours . A.had been traveling B. were traveling C. have traveled D. traveled 42. The house was very quiet when I got home . Everybody ………………straight to bed A.had gone B. have gone C. went D. go 43. The man sitting next to me on the plane was nervous because he……………..before . A. hasn’t flown B. didn’t fly C. hadn’t flown D. wasn’t flying 44. ……………a car when they were living in London ? A. Have they B. Did they have C. Were they having D. Have they had

Tìm x. 1 + 4 + 7 + ...+ (3x +1) = 1717

Tìm mệnh đề sai và giải thích : A. ∀ x ∈ R , x ² + 2x +3 >0 B. ∀ x ∈ R , x ² ≥ x C.Tồn tại x ∈ R , x ² + 5x + 6 = 0 D.Tồn tại x ∈ R , x < 1/x

Bài 1. Tìm những danh từ, động từ, tính từ có trong câu văn sau: Tôi nghĩ đến mấy quyển sách quý của tôi. Tôi quý chúng có lẽ còn hơn cả những ngón tay tôi. (Nam Cao)