1.A

2.D

3.B

5.A

7.C

8.B

9.B

11.B

12.D

13.A

14.D

15.C

16.B

17.A

18.B

This letter will be translated into Vietnamese.

        I still call An Duc Secondary School my second home. It is located in An Duc Village, Quynh Phu District, Thai Binnh Province. Although my school is not very large, it is very spacious and clean and beautiful. The school gate is very tall and spacious, and on both sides of the corridor are flower beds leading directly to the school yard and the classrooms. The school yard is quite large, around the yard are ancient eagle and phoenix trees covered in shade, with flower beds and green grass. Under the trees are rows of benches for us to read and talk after each class. The classrooms are fully furnished with desks and chairs, a cupboard for study supplies and a corner for displaying beautiful articles and articles. In addition, my school also has other classrooms such as music room, computer room, library, English classrooms ... I love my school very much. One day, I will walk away from this school, but I will always remember it along with the beautiful memories it brings.

      Summer is a fun season, so there are lots of activities in summer. We can go to the beach and play volleyball, and swim at sea. Then we can sit and enjoy the famous delicious specialties. The second activity, we can go camping together, it's fun, isn't it? Sitting by the fire together, singing good songs, it's wonderful. For those who love adventure, summer is a great vacation to explore mysterious caves, mysterious forests and even deep carpeted valleys with no bottom. And we can join the summer camp, have fun, and the summer is great, right? Summer is a great season, not only that it's also a vacation, you can have lots of fun summer activities with your family and friends. Here are my opinions, if you like, give them a try!

\(P\left(x\right)-Q\left(x\right)=3x^2+x-\left(-3x^2\right)+2x-2\)

                       =\(-3x^2+x+3x^2-2x+2\)

                       =\(\left(-3x^2+3x^2\right)+\left(x-2x\right)+2\)

                       =-x+2

Đặt -x+2=0

     =>-x=-2

=>x=2

Vậy 2 là nghiệm của đa thức P(x)-Q(x)

Uk, tại mk ko đọc kĩ đề, cảm ơn đã nắc nhở nhé