\(-|x|=11\)

⇔\(|x|=-11\)  (vô lý)

⇔\(x\in\varnothing\)

Vậy phương trình vô nghiệm

1. I don't belong to this particular government committee.

2. Hurry! The bus is coming. I don't want to miss it.

3. Martha is a vegetarian. She doesn't eat meat.

4. I have been looking for the manager. I can't find him anywhere.

5. We are succesful because we take the time to talk to our customers.

6. John deals with all the enquiries about sales. (deaf → deal)

7. At the moment, we are making a training video for Siemens.

8. Do you know what Mr.Brown is doing? He is not in his office.

9. Unemployment is falling and is now down to 5.6%. (fail → fall)

10. Jane is doing some research in the library. She needs is for a book she is writing. (white → write)

Chậm tay mất rồi

\(A=1.2.3...9-1.2.3...8-1.2.3...8.8\)

    \(=1.2.3...8.\left(9-1-8\right)\)

    \(=1.2.3...8.0\)

    \(=0\)

a, 4;18;40;70;108;154;208;270

b, 1;6;15;28;45;66;91;120

1. He no longer comes late for class,

→He used to come late for class.

2. When I was a child, I was afraid of ghost.

→I used to be afraid of ghost when I was a child.

3. I lived in London once, but I don't any more.

→I used to live in London, but I don't any more.

4. We had lots of friends when we lived in the country.

→We used to have lots of friends when we lived in the country.

5. Nga enjoys listening to traditional stories.

→Nga is interested in listening to traditional stories.

6. Mr. John gave up smoking 10 years ago.

→Mr. John used to smoke 10 years ago.

7. He doesn't play tennis as well as he used to.

→He used to play tennis better than he does now.

8.I walked to school in 20 minutes.

→It took me 20 minutes to walk to school.

9. My bike is old and black.

→I have got an old black bike.

10. He repaired his bike about thirty minutes.

→It took him about thirty minutes to repair his bike.

After a long hard day, we decided to turn in early. 

He looked at me in unbelieving when I told him the terrible news. 

Kate asked me where i was going for holidays that year.

Mary apologized to Jane for not coming to her wedding.