1. Lan tells me how to do English homework .

2. May eats a lot of green vegetables in order to have a good health.

3. Eiffel Tower is visited by many people.

5. The Statue of Liberty was presented to the United State

1 . It is company importing suagar.

2 . Tom said that his friend was coming the next week.

3 . The family had the house painted for Tet by someone .

4. The window was broken by the boys last night.

5 . He asked me if I had seen that car .

6. Na is always missing the bus.

1. Hoa asked Phuong if she often went to school by bike .

2 . Ann said that she had looked for my skates the last week.

3 . The woman said that she had left her watch at home so she hadn't known the time .

4 . My mother has the flowers watered by the gardener every morning.

5 . Viet Nam is a coffee - exporting country.

Có nhiều cách để bảo quản và chế biến các loại thịt như : rửa sạch cho vào túi nilong để ở nhiệt độ cao hoặc phơi khô đóng hộp , ép lấy nước , ...

Giả sử có một đàn voi rừng trong quá trình di chuyển chỗ ở đã tàn phá nhiều vườn tược, hoa màu, nguy hiểm hơn chúng đã giẫm chết và làm trọng thương nhiều người.

ý bạn hỏi là gì vậy

Put the words in order to make a complete sentence. (1.0 pt)

1. like / you / to / for / house / lunch / my / would / come / to?

Would you like to come to my house for lunch ?.

2. longer / are / elderly / people / are / people / so / there / living / more.

People are living longer so there are more elderly people .

3. people / the / baseball / of / all / world / play / round / watch / and / millions.

Millions of people play and watch baseball all around the world .

4. next / they / show / around / them / week / Hanoi / Hoa / visit / will / when / her.

…Hoa will visit Ha Noi nextweek when they show her around them. ………

5. detective / parents / going / movie / this afternoon / we / see / with / are / a / our / to.

…We are going to see a detective movie with our parents this afternoon.………………………..

Cách 1: 
VP (✽) = 
= p² - 2ap + a² + p² - 2bp + b² + p² - 2cp + c² + p² 
= 4p² - 2p(a + b + c) + a² + b² + c² 
= 4p² - 2p.2p + a² + b² + c² . . . . do a + b + c = 2p , theo giải thiết 
= 4p² - 4p² + a² + b² + c² 
= a² + b² + c² = VP (✽) 

--> đpcm 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
Cách 2: 
Ta có: p = (a + b + c)/2 
--> p - a = (b + c - a)/2 
--> (p - a)² = (b + c - a)²/4 
--> (p - a)² = (b² + c² + a² - 2ab - 2ac + 2bc)/4 (1) 

tương tự: 
(p - b)² = (a + c - b)²/4 
. . . . . = (a² + c² + b² - 2ab + 2ac - 2bc)/4 (2) 
(p - c)² = (a + b - c)²/4 
. . . . . = (a² + b² + c² + 2ab - 2ac - 2bc)/4 (3) 
p² = (a + b + c)²/4 = (a² + b² + c² + 2ab + 2bc + 2ac)/4 (4) 

Cộng vế với vế của (1) , (2), (3) và (4) lại ta có: 
(p - a)² + (p - b)² + (p - c)² + p² = a² + b² + c² --> đpcm 

ý c đó