._. Có đấp ấn kề, sao khôn coai?

Chỗ 2b²(b¹+3a²) sửa b¹ thành b² nha. Còn cái nữa là do xuống hàng nên hơi khó nhìn :v

Làm cách khác với "thị nở" :v.

a) \(\left(a+b\right)^3+\left(a-b\right)^3=2a\left(a^2+3b^2\right)\)

\(=\left[\left(a+b\right)+\left(a-b\right)\right]\left[\left(a+b\right)^2-\left(a+b\right)\left(a-b\right)+\left(a-b\right)^2\right]=2a\left(a^2+3b^2\right)\)

\(=\left(a+b+a-b\right)\left(a^2+2ab+b^2-a^2+b^2+a^2-2ab+b^2\right)=2a\left(a^2+3b^2\right)\)

\(=2a\left(a^2+3b^2\right)=2a\left(a^2+3b^2\right)\)

b) \(\left(a+b\right)^3-\left(a-b\right)^3=2b\left(b^2+3a^2\right)\)

\(=\left[\left(a+b\right)-\left(a-b\right)\right]\left[\left(a+b\right)^2+\left(a+b\right)\left(a-b\right)+\left(a-b\right)^2\right]=2b\left(b^2+3a^2\right)\)

\(=\left(a+b-a+b\right)\left(a^2+2ab+b^2+a^2-b^2+a^2-2ab+b^2\right)=2b\left(b^1+3a^2\right)\)\(=2b^2\left(b^2+3a^2\right)=2b^2\left(b^2+3a^2\right)\)

Complete the second sentence so that it has a similar meaning to the first one. Use the words or phrases given.

1. He's the best player our team has ever had. NEVER

Our team has never had such good player

2. Mrs Scott is proud of her cooking. TAKES

Mrs Scott takes pride in her cooking.

3. It's my opinion that you should take more exercise. WOULD

If i were you, I would take more exercise.

4. It's not difficult to make bread. EASY

Bread is easy to be made.

5. I haven't done any gardening for three months. WAS

The last time I did gardening was three months ago.

6. Hoa regrets not watching that film last night. WISHES

Hoa wished she had watched that film last night.

7. Although her leg hurt, Jill finished the race. PAIN

In spite of a pain in her leg, Jill finished the race.

8. There was too little time to go back home by bike. NOT

There was not enough time to go back home by bike.

9. Doing the same things every day gives me no pleasure. ENJOY

I don't enjoy doing the same things every day.

10. Handicapped people find shopping in supermarkets difficult. SHOP

It is difficult for handicapped people to shop in súpermakẹt.

IV. Complete the passage with the words in the box, then answer the questions below.

Dear grandparents,

This is a quick note to tell you how the holiday is going.

We're (1) STAYING in a nice holiday a very quiet part of the town. As you know, (2) THIS is a small city. The people here are very (3) KIND, hospitable and friendly. We have such nice weather since we got here, so we are feeling very happy. We (4) HAVE seen some of beautiful sights and a few museums. We thought they were very impressive. Yesterday we decided to go for a swim; we went to a nice beach where the water was blue and clean. Last night, we had a delicious meal in a wonderful restaurant. The food and services were excellent. When the bill came, we could (5) HARDLY believe in it because it was so cheap. (6) AS our hobbies are sightseeing and swimming, we enjoyed the holiday so much.

I'll write again soon

Love

Jannet and Jackson

V. Rewrite these sentences.

1. Unless we water these flowers, they'll die.

-> If we don't water these flowers, they will die.

2. He doesn't take any exercises. He is so unhealthy .

-> If he took many exercises, he would healthy.

3. This year, he's been to China. He has also been to Brazil. (and)

-> He has been both China and Brazil this year. (bỏ Both cũng dc)

4. Would you like to go to Paris? Would rather go to Budapest? (or)

-> Would you like to go to Paris or Budapest? (thêm either trước Paris cũng dc)

5. He's very tired today. He went to bed very late last night. (because)

-> He is very tired today because he went to bed very late last night.

II. Choose the word (A, B, C or D) that has the difference pronunciation.

1. A. particular B. provide C. pilo D. private

2. A. cook B. look C. proof D. book

3. A. card B. smart C. carry D. start.

4. A. royal B. decompose C. compile D. connect

III. Choose the best word or phrase to complete these sentences.

1. Lan is studying hard ___________ pass the final exam

A. in other that B. that C. in order to D. so that

2. Peter ______________ in Ha Noi for three years.

A. has lived B. lived C. have lived D. lives

3. He used to ______________ out for a walk in the evening when he was young.

A. gone B. go C. went D. going.

4. Mai hasn't finished her homework ______________ .

A. just B. already C. never D. yet

5. John is going to _______________ her mother with the housework .

A. doing B. help C. give D. helps

6. This bag _____________ of plastic.

A. is made B. make C. is making D. made

7. ___________ you mind if I smoked?

A. Are B. Do C. Will D. Would

8. The doctor advised me _____________ a rest after having an operation.

A. to take B. take C. takes D. taking

9. I'm happy _______________ all the exams.

A. is passing B. to pass C. passed D. pass

10. Would you mind if I ______________ a photo?

A. took B. taking C. take D. to take

I. Give correct form of the words

1. English is an interesting and important subject. INTEREST

2. Hoa is the best student in her school. GOOD

3. He can lift that heavy box. He is very strong .STRENGTH

4. I have difficulty in spelling her name. DIFFICULT

5. He is friendly so he has few friends at school . FRIEND

==' môn văn hay dựa vào tình cảm nhỉ (mà chủ yếu là đau buồn :v), bắt hs cảm xúc dâng trào lồng lộn, buồn bã, tủi thân, tự kỉ ,...... :v để rồi bỏ nhà đi bụi, bán vé số, bánh mì hay hút chích :V (kiểu giống như sasuke hay obito ấy nhở:v)

Sao ko gõ Latex, gõ thế này không nhìn dc