Rewrite the sentences without changing their meaning:

1. How much is a bowl of noodles? \(\Rightarrow\).....What is the prize of your hat?.....

2. What 's the height of the Mount Everest?\(\Rightarrow\).....How high is the Mount Everest ?.....

3. How heavy is that big bag?\(\Rightarrow\) .....How much do that big bag weight ?.....

4. That pencil belongs to Hoa.\(\Rightarrow\) .....That is Hoa's pencil.....

5. How much is a bowl of noodles?\(\Rightarrow\).....How much does a bowl of noodles cost ?.....

c) Gọi d là ƯCLN(n; n+2)

=> n chia hết cho d

=> n+2 chia hết cho d

<=> n+2 -n chia hết cho d

=> 2 chia hết cho d

=> d=1 hoăc d=2

=> ƯCLN(n;n+2) là 2

Vậy...

Summer vacations are the best time to relax and enjoy with family and friends, it’s the time I eagerly waited for every year. This year’s summer vacation is so special to me because it was the first time I’ve been on a trip with my colleagues. We had a wonderful time in Vung Tau – the city which has most beatiful beaches in Vietnam.

1. What ___is___ this?

2. We ___are___classmates.

3. That ____is____ a book.

4. The children _____are_____ fine.

5. What ____is____ your name?

goi 2 scp lien tiep la a^2 va (a+1)^2 co

a^2+(a+1)^2+a^2(a+1)^2

=a^2+a^2+2a+1+a^4+2a^3+a^2

=a^4+a^2+1+2a^3+2a^2+2a
=(a^2+a+1)^2

vi a^2+a la so chan lai cong them 1 nen (a^2+a+1)^2 la so chinh phuong le