Предмет: Алгебра, автор: Ivankukolka

Помогите пожалуйста!!!

Докажите что если х + b = 1, то 4b² - (x² - b² - 1)² равно нулю.

Ответы

Автор ответа: aarr04594
2

Відповідь.

################

Приложения:

Ivankukolka: Спасибо :)
Похожие вопросы
Предмет: Английский язык, автор: lamalamaaaaaa1
Предмет: Английский язык, автор: ivanovnik2003
4.Дополните и переведите предложения на русский язык: 


1. My sister goes to primary school. She”s very… . 

a. young b. middle-aged c.cold

2. Kim is my sister’s daughter. She is my … . 

a. nephew b. niece c. cousin 

3. He is forty-one. He is … . 

a. young b. middle-aged c. old 

4. Their friend Hugo lives in Ottawa. It is in … . 

a. Greeze b. Canada c. Brazil 

5. Many people of different nationalities live in the USA now. They are Russian, Brazilian, 

… . 

a. Turkey b. Tokyo c. Turkish 

6. How old is Margaret?- …eighteen. 

a. She is b. They are c. He is 

7. How old is …? 

a. you brother b. your brother c. you 

8. …friends from Argentina. 

a. He b. His c. He’s 

9. His ….a student at Mortimer College. 

a. cousin b. uncles c. Cousins 

!0. The capital of Australia is … . 

a. Paris b. Athens c. Canberra 

11. My aunt Helen is my father’s …. . 

a. cousins b. sister c. Brother 

12. The teenage years … between thirteen and nineteen. 

a. is b. are c.be 

13. …forty and… from Scotland. 

a. He’s b. His c. Hers 

14. We … also good friends. 

a. is b. be c. Are 

15. Mary is … than her young sister. 

a. the prettiest b. prettier c. pretty 

16. People from Sweden and Norway usually have … . 

a. slanting eyes b. fair hair c. dark skin 

17. Their neighbors … the guitar. 

a. has b. have c. to have 

18. He … swim well. 

a. can b. likes c. like 

19. Our father is the… in the family. 

a. tallest b. tall c. Taller 

20. …you ask her not to play violin at night? 

a.Are b. Have c. Can 

21. Sometimes she feels herself … than earlier. 

a. more happy b. happier c. The happiest 

22. My aunt has a … hairstyle. 

a. modern b. old-fashioned c. Her 

23. I like this woman, because, she is always … . 

a. clean-shaven b. blue-eyed c. Well-dressed 

24. …. they any distinguishing features. 

a. Have to b. Have c. Has 

25. I think, Mr. Smith … ask for any other job. 

a. could b. could to c. can to 

26. Her height is 178 cm. She is … . 

a. short b. tall c. fat 

27. I don’t like such a bad-tempered … . 

1819 

a. man b. men c. mans​