Ta có: 27³+9⁵=3³.9³+9⁵=9³.(3³+9²)=9³.108=9³.4

Gọi số bị trừ là A3 ⇒ số trừ là A.

Theo bài cho ta có: A3 ‐ A = 57⇒10A + 3 ‐ A = 57 ⇒ 9A = 57 ‐ 3 = 54 ⇒ A = 54 : 9 = 6.

Vậy số bị trừ là 63; số trừ là 6.

1. My mother is buying (buy) some food at the grocery store.
2. Luke isn't studying (not study) Japanese in the library. He’s at home with his friends.
3. Is she running (she, run) down the street?
4. My cat is eating  (eat) now.
5. What are you waiting (you, wait) for?
6. Her students isn't  trying (not try) hard enough in the competition.

7. All of Andy’s friends  are having (have) fun at the party right now.
8. My neighbours are travelling (travel) around Europe now.
9. The little girl is drinhking  (drink) milk.
10. Listen! Our teacher is speaking (speak).

Câu 8 . A

Ta có: VT= (x-1) (x^2+x+1)

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

= x^3- x^2+ x^2- x + x - 1

= x^3 -1 = VP

=> ĐPCM

anh ơi câu 5 bài 2 và câu 2 bài 3 anh viết sai chính tả ạ

Bài 1

1 I don't play football

2 My counsin doesn't live in this town

3 My sister and I don't go to school by bike

4 Peter doesn't like school

Bài 2

1 don't go

2 cooks

3 don't go shopping

4 likes

5 doesn't swim

Bài 3

1 How are you

2 How old are you

3 Where are you from?

4 Have you got any brothers

5 How old is he

Grammar

1. Complete the sentences with the verbs in the box

1. do

2. live

3. drives

4. play

5. listen 

2. Comlete the senteces with the correct words.

1. gets up/wakes up

2. works

3. watch

4. drives

5. live

Vocabulary

3. Complete the sentece with the correct words.

1. C

2. B

3. C

4. C

5. A

Có gì sai mọi người sửa giùm nha

Câu B nha