Предмет: Алгебра, автор: stas12302007top

2 Найдите ошибку и запишите рядом, что неверно
1.(4у-3х)(4у+3х)=8у²-9у²
2.100х²-4у²=(50х-2у)(50х+2у)
3.(3х+у)²=9х²-6ху+у²
4.(6a-9c)²=36a²-54ac+81c²
5.х³+8=(х+2)(х²-4х+4)
дал 30 балов

Ответы

Автор ответа: tatsach
4

Ответ:

Объяснение:

1.(4у-3х)(4у+3х)=8у²-9у²>>>16у2-9х2

2.100х²-4у²=(50х-2у)(50х+2у)>>

(10х-2у)(10х+2у)

3.(3х+у)²=9х²-6ху+у²>>>9х²+6ху+

у²

4.(6a-9c)²=36a²-54ac+81c²>>>

36a²-108ac+81c²

5.х³+8=(х+2)(х²-4х+4)>>>

(х+2)(х²-2х+4)


stas12302007top: надо же потписать что неправильное а что правильное
tatsach: Все неправильно
Похожие вопросы
Предмет: Математика, автор: Чикуля335
Предмет: Английский язык, автор: schoolboy31
Выберите правильный ответ.
1. I remember (to meet/meeting) him last year.

2. I must remember (to meet/meeting) him at the station tomorrow.

3. Please, remember (to close/closing) the door when you go out.

4. I remember (to close/closing) the door, but I’m not sure that I locked it.

5. Don’t forget (to lock/locking) the door before (to go/ going) to bed.

6. He forgot (to bring/bringing) his passport. He left it on the table.

7. I’ll never forget (to go/going) out with my aunt in my childhood.

8. Try (to forget/forgetting) it; it isn’t worth (to worry/ worrying) about.

9. I rang the doorbell but there was no answer. Then I tried (to knock/knocking) on the door, but there was still no answer.

10. We tried (to put/putting) the fire out but we were unsuccessful.

11. Sue needed to borrow some money. She tried (to ask/ asking) Gerry but he was short of money, too.

12. Please, leave me alone. I’m trying (to concentrate/concentrating).

13. I need a change. I need (to go/going) away for a while.

14. The windows are dirty. They need (to clean/cleaning).

15. You don’t need (to ask/asking) his permission every time you want (to leave/leaving) the room.

16. Your hair needs (to cut/cutting). Would you like me (to do/doing) it for you?

17. We stopped there (to buy/buying) some biscuits.

18. Please, stop (to ask/asking) me questions.

19. ‘Did you start your diet?’ ‘Sure, but I can’t help (to eat/eating) sweets.’

20. Can you help me (to get/getting) the dinner ready?