308 nha bạn nhớ

(x-5)(x+3)<0

->

hoặc x-5>0 =>x>5

x+3<0=>x<3(loại)

hoặc x-5<0=>x<5

x+3.0->x>3

3<x<5 =>x=4

Vậy x=4

Ba ông hài = hai ông bà

Có  2 ông bà trên sân khấu

137 cây bạn ơi

2

k nha

1. Thinking of making toys from used paper was his interesting idea.

It’s interesting that he thought of making toys from used paper.

2. He hasn’t come back to his home village for over 20 years now.

It’s over twenty years since he last came back to his home village.

.......... %?

1 hihi

1.Cell phones are used by a lot of people.

2.We haven't been taught by Miss Diep since the last semester.

3.Our English lessons are taught by Mr Vinh.

4.That experience is being done by a student.

5.We are given a free period by our teacher this Saturday to prepare the festival.

6.Was this dictionary bought to weeks ago?

7.Our teeth should be cleaned twice a day .

8.l wasn't expressed by Alan's knowledge about science and technology.

9.All of us are driven to school by her father every day.

10.A new school is going to be built here next year.

  2,7 x 71,8 - 2,7 x 1,8 

= 27 x ( 71,8 - 1,8 )

= 2,7 x 70

= 189 

Mình không copy đâu .

1 người vì ba nghĩa miền Nam là bố nên trên sân khấu chỉ có 1 người thôi ( ủng hộ mk nha )