lap dan y bai van ta canh mot buoi chieu trong vuon cay

hình nào kh có trục đối xứng 

a.tam giác đều

b. hình tròn

c.đường thẳng

d. hình hộp xiên

$$\begin{gathered} a) \sqrt{x+1}=3\left(x\ge 1\right) \\ b)\sqrt{x-1}=2x với x\ge 1 \\ c)\sqrt{3x-1}=\sqrt{x-2}với x\ge 2 \\ d) 3\sqrt{x-1}+2=4-\sqrt{x-1} \end{gathered}$$

$$\begin{gathered} B=\sqrt{8+2\sqrt{7}}+\sqrt{11-4\sqrt{7}} \\ A=\sqrt{14-6\sqrt{5}}+\sqrt{{\left(2-\sqrt{5}\right)}^2} \end{gathered}$$

1. REWRITE THE FOLLOWING SENTENCES 
2. Have you ever drunk this tea before ? => Is this ………………..?
3. Why don’t you take part in this acvivity ? => I think
4. To do this work is very difficult . => This work .....................

.                                                              => It’s ..............

1. I’d like you to solve the problem. => Do you ....................................... ?
2. She hasn’t met him since she left HaNoi. => The last time ................................
3. We last went to Hanoi in May. => We haven’t .................................................
4. Listening to music gives me  => I enjoy .............................................
5. May I turn off the lights ? => Would you ............................................ ?
6. Do you mind my opening the window ? => Do you mind .....................?

                                                                      =>Is it .............. ?

1. “ You should do your homework carefully”, Nam said to me.

          => Nam advised .........

1. It’s four months since he last spoken to me. => He hasn’t ......................................
2. Hoa doesn’t speak English as fluently as she used to. => Hoa used to ............
3. “ Are you doing your homework ?” Nam asked me .....................................
4. “ What is she doing ?” Nam asked . => Nam asked ..............................
5. Hoa will be fifteen next week. => It’s .....................................
6. How long is it since they bought this house ? => When ................................. ?
7. He began to read this book two hours ago.  => he has ..........................................
8. I have never read such an interesting story. => This is .....................

                                                                                     => This is .............

1. Mai has never done such a good thing. => This is ........................

 => This is .................

1. My room is large. Her room is large, too.  => (same) ..................

 => ( as... as ) .............

1. She often met her when she lived in Ha Noi. => She used ..............................
2. It’s unnecessary for her to do that work. => She doesn’t ..................................
3. Does he have to sell this house ? => Is it ................................ ?
4. She couldn’t pass the exam because she was lazy. => Because of ......................
5. She is young. She can’t take part in this activity.

=> ( so.... that ) .................... => (enough ) .......................=> ( too .... to ) .............................

1. She ‘ll write to you when she comes to Hue. She promises. => She promises .........
2. She ‘s back from Ha Noi after two months there. => She has ......................
3. It took us two months to do that work. => We spent .......................................
4. She did these exercises in two hours. => She spent .......................

=> It took ..........

1. What’s the weather like ? => How .................. ?

Complete the conversation.

A:         What is your (1) ____________________hobby?

B:         I enjoy sewing.

A:        Why?    

B:        Because I want to (2) __________________ my own clothes.

A:       When did you start your (3) _______________________?

B:       I started my hobby (4) _________________ I was twelve.

A:       Do you (5) _______________ this hobby with anyone?

B:       Yes, my elder sister loves it, (6) _________________.

A:       (7) __________________ do you get the sewing patterns?

B:       I get them (8) _________________ fashion magazines.

A:       Is it (9) ___________________  or (10) _________________________?

A:       It’s quite difficult, I think.

$$\begin{gathered} Rút gọn các biểu thức sau \\ a) \sqrt{18}-2\sqrt{50}+\sqrt{{\left(2-\sqrt{2}\right)}^2} \\ b) \sqrt{\frac{1}{3}}+\frac{3}{\sqrt{3}}+\frac{1}{2-\sqrt{3}} \\ c) \left(1+\sqrt{2}+\sqrt{3}\right)\left(1+\sqrt{2}-\sqrt{3}\right) \\ d) 3\sqrt{200}-2\sqrt{0,08}-4\sqrt{\frac{9}{8}} \end{gathered}$$