2^2=4   3^1=3

4>3

2^2>3^1

Mk k cho bạn rồi đó, cả 6 cái luôn, giờ bạn k lại đê

615 hs nam

523 hs nữ

1) B. sociable

2) D. tell

3) D. has been

4) A. long straight black hair

5) C. reduce

1/ There didn't use to be so many tourists.

2/ The streets didn't use to be very dirty.

3/ The houses didn't use to be very expensive.

4/ He used to smoke.

5/ We used to have a car park.

6/ I used to do a lot of exercises.

7/ They didn't use to have a central heating in the living room.

8/ The car park didn't use to be full of cars.

= 75 quả 

tick nhé !

x³ + 9x² + 27x + 27 = x³ + 3.3.x² + 3.3².x + 3³ = (x+3)³