K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

a) Xét tứ giác ADHE có 

\(\widehat{ADH}\) và \(\widehat{AEH}\) là hai góc đối

\(\widehat{ADH}+\widehat{AEH}=180^0\left(90^0+90^0=180^0\right)\)

Do đó: ADHE là tứ giác nội tiếp(Dấu hiệu nhận biết tứ giác nội tiếp)

2 tháng 4 2021

1. loves a birthday cake which I made for her very much.

2. suddenly colapsed when i was sitting on it .

3. The woman who is my president is Mr.Hung's wife.

4. Even though she is good at English ,they didn't accept her.

5. The novel which my uncle wrote 2 years ago is very intersting.

6. Have you ever spoken to the Browns who live next door ?

7. Where is the girl who sells the tickets ?

8. Though he had a serious financial problem , he didn't ask any friend of him for help.

9. Is MR.Pike ,who is from Australia, your teacher?

10. The book which will interesst children of all ages has just been published.

[Mik nghĩ chỗ the book này là nên chia bị động chứ nó không thể tự publish (xuất bản) được ]

2 tháng 4 2021

11. David has a Master's degree , he works as a store clerk.

12. There are some word which are vẻy difficult to translate.

13. That is the most beutiful woman (whom) I have ever met.

14. All the things which we bought this morning are for the birthday party.

15. This is the most difficult question (which) I have ever met.

16. I met many people , their cattle and vehicles that went to the fair. ( vừa có người vừa có vật thì dùng ĐTQH là that )

17. They gave me four cakes , one of which was spoiled.

18. Intel computers ,which are made in Indian, are very good.

19. The building which was destroyed in the earthquake has now been rebuilt.

20. Although Mr John is over 80 years , he walks 10km everyday.

25 tháng 3 2021

705C

706B

707D

708C

709A

686A

687D

11 tháng 4 2021

1 If Nancy didn't played trick on me in front of my classmates, I wouldn't hate her

2 We've never had a more useful English lesson than this before

26 Unless you practice speaking Englisg regularly, you can't improve your speaking skill

27 The penthouse suite which is situated on the top 2 floors, 45th and 46th is being stayed in by the singer

28 Mary asked Jim how the English language had changed over the decades

29 It was decided by us that your contract will not be renewd

30 I'm busy with revising for exams

31 On time they arrived at the police station, they were taken to an interview room

32 How about looking for the information about the history of English on the internet?

Độ dài cạnh đối diện với góc 30 độ là 9cm

7 tháng 10 2021

Dạ e cảm ơn

14 tháng 1 2022

mình chịu

30 tháng 9 2021

\(5,\\ a,=x^4+4x^2+4-4x^2=\left(x^2+2\right)^2-4x^2=\left(x^2-2x+2\right)\left(x^2+2x+2\right)\\ b,=x^4+16x^2+64-16x^2=\left(x^2+8\right)^2-16x^2=\left(x^2-4x+8\right)\left(x^2+4x+8\right)\\ c,=x^8+x^7+x^6-x^6+x^5-x^5+x^4-x^4+x^3-x^3+x^2-x^2+x-x+1\\ =x^6\left(x^2+x+1\right)-x^4\left(x^2+x+1\right)+x^3\left(x^2+x+1\right)-x\left(x^2+x+1\right)+\left(x^2+x+1\right)\\ =\left(x^6-x^4+x^3-x+1\right)\left(x^2+x+1\right)\)

30 tháng 9 2021

\(d,=x^8+2x^4+1-x^4=\left(x^4+1\right)^2-x^4=\left(x^4-x^2+1\right)\left(x^4+x^2+1\right)\\ =\left(x^4-x^2+1\right)\left(x^4+2x^2+1-x^2\right)\\ =\left(x^4-x^2+1\right)\left(x^2-x+1\right)\left(x^2+x+1\right)\\ e,=x^5+x^4-x^4+x^3-x^3+x^2-x^2+x+1\\ =x^3\left(x^2+x+1\right)-x^2\left(x^2+x+x\right)+\left(x^2+x+1\right)\\ =\left(x^3-x^2+1\right)\left(x^2+x+1\right)\\ f,=x^3+2x^2-x^2-2x+2x+4\\ =\left(x+2\right)\left(x^2-x+2\right)\\ g,=x^4+2x^2+1-25=\left(x^2+1\right)^2-25\\ =\left(x^2+1-5\right)\left(x^2-1-5\right)=\left(x^2-4\right)\left(x^2-6\right)=\left(x-2\right)\left(x+2\right)\left(x^2-6\right)\)

\(h,=x^3-2x^2+2x^2-4x+2x-4=\left(x-2\right)\left(x^2+2x+2\right)\\ i,=a^4-4a^2b^2+4b^4-4a^2b^2=\left(a^2-2b^2\right)^2-4a^2b^2\\ =\left(a^2-2ab-2b^2\right)\left(a^2+2ab-2b^2\right)\)

9 tháng 5 2022

D. WRITTING

I

1. How far is it from your house to school

2. What are used to produce energy in that area?

3. WHy you don't like that film?

II

1. Their houses will be decorated to welcome New Year

2. It is about 30km from HN to Phuc Yen

9 tháng 5 2022

III

1. A => Although

2. B => walk

3. C => by her mother

4. B=> will be lying