1. Our boss suggested that the trip to the countryside (delay)_______untill next month.

2. She stopped talking about her illness and went on_______(work).

3. The casstle looks so old that it needs (repair)_______.

4. _______(make) of metal, the gate is quite safe.

5. Could you tell me the name of the man (make)_______a speech on the stage?

 - I have no idea.

6. Miss White (finish) _______her course by the time we return next month.

7. Your coat is dirty. You must have it (clean) _______

8. Science fiction stories (write) _______ by my sister for at least twenty years.

Làm+giải thích chi tiết

.  _______, it is obvious that the whole thing was a waste of time and effort.

          A. None of us wanted to go in the first place

          B. Staff meetings are often boring and have no apparent point to them

          C. Since the results were far more satisfactory than anyone had expected

          D. Seeing that we couldn’t solve anything in the end. 

Tích các tập nghiệm [ x^2+2x-1]=2 

Lưu ý  [ ] là trị tuyệt đối nhé vì ko tìm đc nên em dùng tạm

tìm giá trị x để biểu thức 5-2x/x^2+ 4 nhận giá trị dương

Giải phương trình 20(\(\dfrac{x-2}{x-1}\))\(^2\)-5(\(\dfrac{x+2}{x-1}\))\(^2\)+48\(\dfrac{x^2-4}{x^2-1}\)=0 ta đc nghiệm x\(_1\)và x\(_2\)với x\(_1\)<x\(_2\) Tính 3x\(_1\)-x\(_2\)

Giải phương trình:\(\dfrac{x+98}{2}\)+\(\dfrac{x+96}{4}\)+\(\dfrac{x+65}{35}\)=\(\dfrac{x+3}{97}\)+\(\dfrac{x+5}{95}\)+\(\dfrac{x+49}{51}\)