tìm tất cả các nghiệm nguyên của phương trình x^2+6x=y^2

Bài 1: Số nguyên tố là số có 2 ước là 1 và chính nó. Hãy viết chương trình con kiểm tra 1 số nguyên có là số nguyên tố hay không?

Tìm từ có cách phát âm khác những từ còn lại

Giải các pt: (Tanx-√3).(1-tanx)=0

trình bày phương pháp hóa học phân biệt các dung dịch đựng trong các lọ mất nhãn sau :HCl, HNO3, H2SO4. viết phương trình hóa học của các phản ứng

√x-1 + √y +3=6 x+y=24 giải hệ phương trình

Viết 1 đoạn văn nhận xét về nội dung và nghệ thuật của "bánh trôi nước" ( khoảng 200 chữ) , m đang cần gấp ,mn giúp m vs

-sắp xếp các từ cho sẵn thành một câu hoàn chỉnh future / many / spaceship / the / 2030 / people / on / moon / a / will / to / by . mik đang cần gấp đúng mik sẽ vote 5 sao mik đang cần gấp đúng mik sẽ vote 5 sao

36. “Why don’t we travel to Phu Quoc Island by ferry?” they said. A. They asked why we didn’t travel to Phu Quoc Island by ferry. B. They suggested travelling to Phu Quoc Island by ferry. C. They wished that we travelled to Phu Quoc Island by ferry. D. They wanted to travel to Phu Quoc Island by ferry. 37. Life in the countryside isn’t as stressful as life in the city. A. Life in the city is less stressful than that in the countryside. B. Life in the countryside is more stressful than that in the city. C. Life in the city is more stressful than life in the countryside. D. Life in the countryside is so as stressful as life in the city. 38. You are not allowed to leave the room without permission. A. You mustn’t leave the room without permission. B. You might leave the room without permission. C. You have right to leave the room without permission. D. You don’t have to leave the room without permission. 39. He borrowed my book, but he forgot to return it. A. I will never let him borrow my book again. B. He never returned the book he borrowed me. C. I lent him my book, but he didn’t remember to return it. D. I asked him for my book which he forgot to return. 40. It is not a good idea to spend too much time on computer games. A. It’s not good to stop spending too much time on computer games. B. It’s better to avoid spending too much time on computer games. C. It’s not good to postpone spending too much time on computer games. D. It’s better to continue to spend too much time on computer games

Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions. 31. Although they always argue with each other, but they are good friends. A. always B. with C. but D. friends 32. My brother used to working downtown, but he moved to the suburbs three months ago. A. working B. downtown C. moved D. suburbs 33. He didn’t have money to buy food because he has forgotten to ask his parents. A. to buy B. because C. has forgotten D. to ask 34. The scientists are investigating an area on Mars which liquid water may be found. A. are investigating B. on C. which D. be found 35. If people use contaminated water for cooking, their health would be badly affected. A. contaminated B. cooking C. would D. badly affected