`f'(x) = (x^2)'e^x + x^2.(e^x)'`
`= 2xe^x + x^2.e^x`
`= (2x + x^2).e^x`

Tính đạo hàm lần 2 của f(x):
`f''(x) = ((2x + x^2).e^x)'`
`= (2x + x^2)'.e^x + (2x + x^2).(e^x)'`
`= (2 + 2x).e^x + (2x + x^2).e^x`
`= (2 + 4x + x^2).e^x`

Ta thay x = 0 vào công thức trên:
`f''(0) = (2 + 4.0 + 0^2).e^0`
`= 2.1`
`= 2`

Vậy, f''(0) = 2.

I am shorter than my brother.

There are 35 pupils in my class.

Nam's favourite drink is tea.

The bakery is located behind the bookstore.

Ha goes to school by walking every day.

7 He said that his mother would come there the next day.

8 She said that her brother had lunch at home.

9 If he studies hard, he will pass the exam.

10 They said that they liked their uniform very much.

11 She has not returned to her village for two years.

1 He told me to drive my car carefully.

2 They told us not to play that kind of game.

3 He told her that she should study hard now.

4 I asked her if she was reading comics today.

5 My brother said that he wore a new shirt yesterday.

6 He advised me not to draw on the wall.