a^2(x+y)-b^3(x+y)

viết đoạn văn khoảng 10-12 câu nêu suy nghĩ của em về nhân vật quan phụ mẫu trong tác phẩm "Sống chết mặc bay" của Phạm Duy Tốn. Đoạn văn có sử dụng câu mở rộng, gạch chân

Tính giá trị của các biểu thức sau:

A=3x−9 tại x=-1 và x= -1/ 2

B=2x+ytại x= 1 và y = -3

C = -x3 +2x2 − 1 tại x= -2; x= -1/ 3 ; x = -1

9. They walk to work every day.

A. How they to work every day?

B. How do they to work every day?

C. How do they go to work every day?

D. How do they walk to work every day.

10. He opened the door last night.

A. The door opened last night.

B. The door was opened last night.

C. The door is opened last night.

D. The door wasn’t opened last night.

7.  My foot was hurt,but  I managed to walk to the nearest village.

A. Although my foot was hurt, I managed to walk to the nearest village.

B. Despite my foot was hurt, I managed to walk to the nearest village.

C. Although I managed to walk to the nearest village, my foot was hurt.

D. Despite I managed to walk to the nearest village, my foot was hurt.

8. They found “Transformers” exciting.

A. They are excited about “Transformers”.

B. They were excited about “Transformers”.

C. They are exciting about “Transformers”.

D. They were exciting about “Transformers”.

All passengers must obey the traffic rules strictly.

A. The traffic rules must to obey strictly by all passengers.

B. The traffic rules must obey strictly by all passengers.

C. The traffic rules must be obeyed strictly by all passengers.

D. The traffic rules must obeyed strictly  by all passengers.

The last time I saw her was a week ago.

A. I haven’t seen her for a week.

B. I haven’t seen her a week ago.

C. I didn’t see her for a week.

D. I didn’t see her a week ago.

Mr Minh teach Maths in this school.

A. Maths are taught in this school by Mr Minh.

B. Maths teaches in this school Mr Minh.

C. Maths is taught in this school by Mr Minh.

D. Maths is teach in this school by Mr Minh.