b) \(x^2-4x+4-\left(x^2+4\right)=0\)

\(-4x=0\)

=> x = 0

a) \(\left(x+2\right)^2=9\)

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

\(\Rightarrow\left[{}\begin{matrix}x+2=3\\x+2=-3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=1\\x=-5\end{matrix}\right.\)

Đáp án A

1 C

2.D

3.B

4.A

5.A

II.

1.B

2.C

3.D

4.A

5.D

1. Nam often does his homework

2 Minh watches television every night

3 Would you like to play badminton?

4 Hoa doesn't have a lot of friends in Hue.

5 The students don't go to school on Sundays.

6 Mai doesn't have Math on Monday.

7 Are you in class 6B?

8 What time do you start your class?

9 Everyday my sister watches TV

10 Nam goes to the English club every Saturday

11 Nam always plays basketball in the winter

12 Ba and Nam aren't doctors

13 He is tired.He'd like to sit down

14 His father isn't a businessman

15 Nga is my friend.He plays games everyday

16 We don't read books after lunch

17 Do Your children play soccer every afternoon?

Đề làm gì vậy bạn

Đáp án D