Предмет: Математика, автор: DarkSummer

Упростить выражение:

-n(2n-3k)-k(3n+2k)+3(n *во второй степени* -k*во второй степени*)

Буду очень благодарна за помощь :З 

Ответы

Автор ответа: Нямнямка40
0
(k5+n5)-(k+n)    вот и всё
Автор ответа: Надежда567
0

Вместо второй степени буду писать n2, k2

-n(2n-3k)-k(3n+2k)+3(n2 -k2) = -2n2 + 3kn - 3kn + 2k2 + 3n2 - 3k2 = n2 - k2 = (n-k)(n+k)

 

 

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: ajdanaasymbekova9


1. She ______a letter at the moment.

A) writes B) has written C) was writing D) is writing

2. I have never________ Paris.

A) gone to B) been to C) been in D) went to

3. Listen! Someone ____ at the door.

A) is knocking B) knock C) knocking D) knocks

4. If we find the tent, we____ camping.

A) went B) will go C) are going D) would go

5. I’ll help him if he _____.

A) ask B) asked C) asks D) will ask

6. Today _____ weather is very hot.

A) a B) an C) the D) –

7. I’ll stay home if it ____.

A) rained B) rains C) will rain D) won’t rain

8. ______ you students?

A) Do B) Are C) Am D) Is

9. Bill is looking ____ his keys but he can’t find them.

A) to B) at C) for D) in

10. He ______ to school every day.

A) goes B) go C) to go D) is going

11. We _____ TV at the moment.

A) isn’t watching B) don’t watch C) aren’t watching D) watches

12. You _____ your keys last week.

A) lose B) lost C) losed D) loses

13. ____ he __ rice every day?

A) Does, eat B) Do ,eat C) Does , eats D) Is, eating

14. He ____ his exercises when I entered the room.

A) have written B) writes C) was writing D) wrote

15. I ____ a book yesterday.

A) have read B) reads C) read D) readed

16. ___ you ___ tennis this Sunday?

A) Are, playing B) Does , play C) Is, playing D) Do, play

17. They ___ to a restaurant every Saturday.

A) goes B) go C) is going D) are go

18. Last year I ______ Paris.

A) visit B) have visited C) visits D) visited

19. If I went on the school trip, I ____ rock climbing.

A) would try B) tried C) would tried D) try

20. If you _____ that window , Mr. Simms would be furious.

A) would break B) break C) broke D) broken

21. ______ is a sport where you slide over frozen water wearing special boots.

A) mountain biking B) ice skating C) caving D) rock climbing

22. I’ve ____ this film three times.

A) see B) saw C) seen D) sees

23. What ___ she ____ in the evenings? She usually ____ cards or ______ TV.

A) does, do, plays, watches B) do, do, play, watches

C) does, does, plays, watches D) does, do, plays, watch

24. The last train ___ the station at 11.30.

A) leave B) will leave C) leaves D) are leaving

25. He usually___ so quickly that I ____ him.

A) speak, don’t understand B) speaks, don’t understands

C) speaks, don’t understand D) speaks, doesn’t understand

26. He ___ TV when the phone rang.

A) was watching B) were watching C) watching D) watch

27. Where ___ you at one o’clock this morning?

A) were B) was C) be D) to be

28. Fred is _____ than Pat.

A) tall B) taller C) the tallest D) most tallest

29. My brother and sister ______ TV now.

A) is watching B) watching C) are watching D) watch

30. I _____ jeans to school yesterday.

A) wear B) wears C) wore D) am wearing



помогите пожалуйста











​
6 лет назад
Предмет: Русский язык, автор: Tshechkova15
Выбери среди вариантов архаизмы:
1)дормез
2)вовнутрь
3)психея
4)комонь
5)отродясь
6)сбитень
7)булава
6 лет назад
Предмет: Алгебра, автор: topmira34
Помогите пожалуйста по алгебре​
6 лет назад
Предмет: Геометрия, автор: Катя19986

Помогите пожалуйста!!! При наложении треугольника ABC на треугольник MKH сторона AB совместилась со стороной MK, сторона AC — со стороной MH. Совместилась ли сторона BC со стороной KH? Объясните ответ
10 лет назад
Предмет: Химия, автор: Аноним

Выбирите уравнения реакций, характеризующих химические свойства кислотных оксидов:

a)Ca + H2So4 = CaSo4 + H2

б)MgO + So3 = MgSo4

в)So3 + 2NaOH = Na2So4 + H2O

г)NaOH + HCl = NaCl + H2)
10 лет назад