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17 tháng 10 2019

c) x\(^5\)+x+1

= x\(^5\) - x\(^2\) +x\(^2\) + x + 1

= ( x\(^5\) - x\(^2\) ) + (x\(^2\) + x + 1)

= x\(^2\)(x\(^3\) - 1) + (x\(^2\) + x +1)

= x\(^2\)(x - 1)(x\(^2\) + x +1) + (x\(^2\) + x + 1)

= (x\(^2\) + x + 1)[x\(^2\)(x - 1) +1]

24 tháng 10 2019

Cảm ơn cậu nhá haha

23 tháng 8 2019

1,B

2,D

23 tháng 8 2019

Choose the best answer:

1. _____ do you expect to have the work completed?

A. When B. What C. Who D. How far

2. _____ love is such ____ beautiful thing.

A. A - x B. x - a C. The - a D. A - the

Chúc bạn học tốt

1 tháng 11 2019

1. things/ are/ a lot of/ there/ like/ i/my/free time/ to do/in

i like

2. usually /Annie/throws away /stamps/common/the

Annie usually common the stamps throws away

3. often/do/you/how/exercise/and/so sport?

how do you often exercise and so sport?

4, started / how to play/i/learn/to/three weeks / the guitar/ago.

i started learn how to play the guitar to three weeks ago

5.is/one of/drawing/leisure/her/activities

4 tháng 11 2019

1. There are a lot of things i like to do in my free times.

2.Annie usually throws away the common stamps.

3.How often do you exercise and so sport.

4.I started to learn how to play the guitar three weeks ago.

5.Drawing is one of her leisure activities.

3 tháng 1 2018

X. Complete the sentences with “tell, say, speak, talk, ask” and their correct forms.

1. Be quite, I have something to.........................say......................

2. The President refused to...........................talk............................... to waiting journalists.

3. I had to.................ask..................... the teacher what to do next.

4. Are you.................telling.................. me you didn’t have any help with this?

5. Ann and Joe aren’t ...................talking..................... to each other right now.

6. How old are you – if you don’t mind my................asking.................... ?

7. He is...................said................... to have been a brilliant scholar.

8. He.............told......................... everybody he saw the news.

9. We looked around the school and..................talked.................. with the principal.

10 I’ve...................told................... to the manager about it.

27 tháng 4 2020

1. has

2. lasts

3. warmer

4. temperature

6. natural

7. happens

8. research

10 tháng 3 2019

1. If / sister / not / take care / the garden everyday / there / not / flowers.

=> If your sister doesn't take care of the garden everyday, there won't have any flowers.

2. Households / dump / waste / river / so / it / polluted.

=> Households are dump waste into the river so it is polluted.

3. The boys / have / stop / play / volleybal / because it / rain / heavily.

=> The boys have to stop playing football because it rains heavily.

4. If / weather / fine, they / go / picnic.

=> If the weather is fine, they will go to a picnic.

5. If I / be / father, I / buy / new car / travel.

=> If I were my father, I would buy a new car to travel.

6. Polluted water / lead / death / fish / lake.

=> Polluted water leads to the death of fish in the lake.

7. Mother / tired, so she / not / go / work.

=> My mother is tired, so she doesn't go to work.

8. If / sister / do / exercise. he / be / healthier.

=> If my sister does exercise, she will be heathier.

9. If / there / be / no fresh water what / happen.

=> If there wasn't no fresh water, I don't know what will happen. (???)

10. People / get / more diseases if water / contaminated.

=> People will get more diseases if water is contaminated.

11. Acid rain / make / plant / die.

=> Acid rain makes plant die.

10 tháng 3 2019

Bn ơi sao có mấy câu mk thấy nó là lạ. Như câu 2 á: đã are thì phải dumping chứ nhỉ. Vs câu 3 hình như là ...because it's raining heavily. Ngữ pháp tiếng anh của mk ko tốt lăm nên bn giải thích giúp mk đc ko?

11 tháng 9 2019

1D

2B

Chúc bạn học tốt haha

2 tháng 10 2019

1.D

2.B

30 tháng 10 2018

Choose bold words to pronounce differently from other words.

1. A. charity B. sticky C. minority D. predict

2. A. generate B. celebrate C. decorate D. describe

3. A. evidence B. device C. saucer D. precious

4. A. pagoda B. hamburger C. relax D. gather

5. A. wanted B. washed C. danced D. played

6. A. magician B. procession C. companion D. musician