4x² + 8x + 4

= 4 ( x² + 2x + 1 )

= 4 ( x + 1 )²

HT

Ko là ko,tự làm

Thôi chỉ giúp câu 1,bài thi ko giúp

Thôi chỉ giúp câu 1,bài thi ko giúp

II. Present simple tense or present continuous

1. Listen! My mother (sing)_______is singing_________________a song.

2. Every night, We (go)_____go___________________to bed at 10p.m

3. Now, they (stay)_____________are staying______________in Hue .

4. My father (read)_____reads_____________________a newspaper in the morning

5. Look! Ha (run)_____is running_________________.

6. The film (start)______starts________ at 7p.m tonight.

7. Next month I (buy)__will buy________ a DVD player.

8. They (go) ___going_________to school by bus today?

9. Everyday, Mr.Hung (not go)_______doesn't go________to work by car.

10. She wants to get her mum a birthday present. But she (not buy) ______isn't buy_________ it today.

11. Their suitcases are packed. They ___will go___________ (go) on holiday tomorrow.

12. In the autumn, I rarely (go)___go____ sailing and (go)___going_____ to school.

13. I (write)_______am writing______________ a letter to my friend now.

14. At 12 a.m everyday, I (have)___have____ lunch and (go)___go_____ to bed.

15. At the moment, I (eat)___am eating____an orange and My sisters (play) ____are playing____tennis.

16. They (not play)____don't play____________soccer in the morning.

17. Hai (work)___is working_________in the garden at the moment?

18. James and his brother (play)____is playinf________soccer at the moment. They (play)______plays________ it every afternoon.

19. Mr.Smith often (teach)___teaches_____ class 4A,but this morning he (teach)___teaches_______class 4B.

20. It's 7.30 now. She (study)____is studying___________ science in the classroom

I. Multiple choice

1. How is your first week ________ school?

                       b. at                    

2. My brother often helps me _______ my homework.

                         d. with

3. Megan is __________ badminton with her friends in the schoolyard.

           c. playing                   

Chất liệu của trang phục ............................phù hợp vào................................... Kiểu dáng của trang phục .............................và.............................. Màu sắc của trang phục .............................để.................................. Họa tiết trang trí ...........nổi bật..................................................... Điểm đặc sắc, ấn tượng của trang phục . của người dao và người thái / giúp e vs e cần gấp

Mg + 2HCl → MgCl₂ + H₂

Chất còn thiếu là: MgCl₂

1.nước