Mấy bạn giúp mình bài này nha!
1) Tính A=(\(\sqrt{6}+\sqrt{2}\))*(\(\sqrt{3}-2\))*\(\sqrt{2+\sqrt{3}}\)

2) Cho x=4+\(\sqrt{10}\)

Tính A=\(\sqrt{3x+\sqrt{6x-1}}+\sqrt{3x-\sqrt{6x-1}}\)

3) Cho \(\sqrt{x}+\sqrt{y}-\sqrt{z}=0\)

CMR: \(\dfrac{1}{x+y-z}+\dfrac{1}{y+z-x}+\dfrac{1}{z+x-y}=0\)

4) Cho (\(\sqrt{x^2+5}+x\))*(\(\sqrt{y^2+5}+y\))=4

CMR: x+y=0

1 Jack is interested in opening ( open) a bar.
2 I like listening (listen ) to the BBC in my free time.
3 Jim doesn't drink (not drink ) tea very often.
4 She had ( have) a car accident last night .
5 She prefers looking ( look) after the children to leaning the room.
6 How about going ( go) to that restaurant tonight?
7 When he was young he didn't like ( not like) sports very much.
8 The neighbors are angry because someone stole (steal ) their car last night.
9 My aunt gave ( give) me a hat for Christmas last year.
10 I had ( have) breakfast quickly because I was late for work.

1,We had a lovely holiday in Spain.We aare going back there the next year.

2,We arrived in Paris on the third of August.

3,Last night we had a dinner in a restaurant.

4,I saw an accident this morning.A car crashed into the tree, so the car was badly damaged.

5,My mother is a shop asistant.

6,On our trip to the South of America,we plan to stop at Haiti and Dominican Republic.

7,A river of the Eastern part of United States flows toward the Atlantic Ocean

8,Who is the woman who lost all the payment?

Đây là ý kiến của mình! Vậy có gì sai xin mọi người góp thêm ý kiến!

x^3+27+(x+3).(x-9)=0

<=> x^3+3^3+(x+3).(x+9)=0

<=> (x+3).(x^2-3x+9)+(x+3).(x-9)=0

<=> (x+3).[(x^2 -3x+9)+(x-9)]=0

<=> (x+3).(x^2- 3x+9+x-9)=0

<=> (x+3).(x^2 -2x)=0

<=> x+3=0

hay x^2-2x=0

<=> x=-3

hay x=2

Vậy, x=-3; x=2

Câu trả lời đúng là:

Can you drive a car?

- No, but my father teaches me.

Mình nghĩ là không có I learn đâu nhỉ?

1. There is a tradition in my country that people giving gifts at Christmas.

2. According to tradition, we grow "Neu" at Tet.

3. My family broke with tradition by traveling around the city instead of visiting grandparents during Tet.

4. My area has the custom of decorating the house on special occasions.

Chúc bạn học tốt!

Mình có thể đăng kí ko v bạn? Hơi chậm chút... Mình là Nguyễn Ngọc Thảo Nguyên_8a1