1.Motorbike taxis,called "xe om" are popular for trips.

2.People can watch films on streaming services like Netflix.

3.Waterfalls and rivers are natural sources of hydropower

1.I think we will travel by hyperloop in the future

2.Traffic in big cities is often worse than in small towns

3.Are there usually special activities for children in festivals?

1.Despite having a low budget,the film was still a success

2.You mustn't throw trash out of your car window in traffic

3.The food at that stall was more delicious than the food at this stall

4.We don't have enough notebooks for the students

1)Đa thức F(x) biểu thị tổng số tiền bác Mai phải thanh toán là:

F(x)=5.80000+3x

      =400000+3x

2)A(x)=2x^2-3x+5+4x-2x^2

         =(2x^2-2x^2)+(-3x+4x)+5

         =x+5

 Trong đa thức A(x) có:

Bậc:1                                                      Hệ số tự do:5

Hệ số cao nhất:1

3)C(x)=(x-1).A(x)+B(x)

   C(x)=(x-1).(x+5)+x^2-2x+5

          =x.x+x.5-1.x-1.5+x^2-2x+5

          =x^2+5x-x-5+x^2-2x+5

          =(x^2+x^2)+(5x-x-2x)+(-5+5)

          =2x^2-x

Vậy C(x)=2x^2-x