Tìm x,y

1. x²+xy+y²=0

2. 2x²+y²+2xy-2x+1=0

Viết các biểu thức sau dưới dạng tổng các biểu thức

1. 2a² + 2b²

2. x⁴+13-6x²+4y+y²

Mình cấn gấp lắm lun á

Có hai xe cùng xuất phát lúc 6 giờ sáng tại hai địa điểm A và B cách nhau 96 km với vận tốc tương ứng v1= 36 km, v2=28km/h

a) Tính khoảng cách giữa 2 xe sau khi xuất phát được 2h

b) Chúng có gặp nhau không? Nếu gặp nhau, hãy xác định thời điểm và vị trí gặp nhau ( Coi 2 xe CĐ thẳng đều)

Mình cấn gấp lắm lun á

Tìm những từ sai trong câu và sửa lại (có nhìu từ mình sợ bị lẫn nên đã phân cách bằng dấu "/")

1. That man is enough patient /to do that job.

A B C D

2. Don’t doing it as a joke. / It’s a serious thing.

3. She received a letter / to her penpal / last week.

4. Each of my friends have a different / character.

5. I usually go to work with a friend, but yesterday I drove to work by himself because he was ill.

6. Alex doesn’t have to take his medicine yesterday because he was better.

7. It is not safe leaving small objects around the house.

8. I must do all the shopping yesterday because the shops are closed today.

9. You must not let children to play in the kitchen because it is very dangerous place.

10. Let’s putting the armchair opposite the couch in the living room.

11. Our live is much better with the help of modern equipment.

12. There wasn’t any electric in our village ten years ago.

13. My brother asks me to not / turn up the cassette player.

14. Language learners should trying different ways of learning words.

15. Children / must / play on the streets.

16. We should / to go / to bed / early.

17. She taught her children how to care after their pets.

18. After / filling on the form, please bring it back to me.

19. The weather / is becoming / cold and colder / in December.

20. Let we / take a taxi home after / the party.

21. Let him / doing / what he / wants.

22. Can you help me moving this table?