cho x-y = -3 , x . y = 10 tính giá trị biểu thức

a , x^2 - 2xy + y^2

b , x^3 - 3x^2y + 3xy^2 - y^3

c , x^2 + y^2

Viết thành tích

2x^2 - 169y^4

125x^3 - 64

729 + 216x^3

1/27 - 27y^3x^3

36x^4 - 49y^2

343x^3 - 1/343y^3

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

đặt 1 câu có cụm C-V mở rộng phụ ngữ cho cụm động từ , 1 câu có cụm C-V mở rộng phụ ngữ cho danh từ

give the correct form of the words in brackets

1 . thirty years ago , people ( watch ) ...... back and white programs

2 . my mother alaways ( wash ) ...... thr vegetables carefully before cooking

3. we ( not play ) soccer yesterday evening , we went to see a soccer match

4 . my family ( have ) ...... a vacation in Nha Trang next summer

I. Complete the second sentence so that it has a similar meaning to the first one.

1.Nam spent two hours repainting his house.

- It took.…...................................................................................................................................

2. This painting is so beautiful.

-What ..........................................................................................................................................

3. Let’s go to the zoo on Sunday.

- What about……………………………………………………………………………………....

4. My car is cheaper than your car.

- Your car is……………………………………………………………………………………..