cho mình hỏi cái ngoặc là giá trị tuyệt đối hay ngoặc bình thường vậy?

n (n+5) - (n-3)(n+2)

= n²+5n - (n² + 2n -3n - 6)

=n²+5n - (n²- n - 6)

=n²+ 5n - n²+ n + 6

=6n + 6 luôn chia hết cho 6

Last year, I have just visited at Da Lat. This is the first time I have gone to Da Lat with my family. I stayed with my family at hotel. My family went to visit a lot of places like: Xuan Huong Lake, Valleys Love, Flower garden,... I saw lots of flowers like: Rose, chrysanthemum, Peony, Sunflower,..at garden. I bought a lot of souvenirs for my friends and my relatives. The places were beautiful, people were very friendly and kind. I like Da Lat very much. I felt happy very much and stronger after this trip to Da Lat.

Hoa and Minh didn't go to school yesterday because of illness

=>Hoa and Minh were absent from school yesterday because of illness

Binh can swim better than Nam

=>Nam can't swim so well as Binh

How wide is the stadium?

=>What is the width of the stadium?

We will have a Sa Pa tour that last for five days

=>We will have a five-day Sa Pa tour

Can't you do better than that?

=>Is that the best you can do?

It isn't necessary for students to wear uniform on Wednesday

=>Students don't have to wear uniform on Wednesday

She feels comfortable to watch TV

=>Watching TV makes her comfortable

We spent a whole day looking for these old pictures

=>It took us a whole day to look for these old pictures

What is the distance between your hometown and your school?

=>How far is it from your hometown to your school?

1. Food/like/lunch/What/would/for/kind/you/of ?

\(\Rightarrow\)What kind of food would you like for lunch ?

2. durians/and/my/like/much/does/I/very/father/so

\(\Rightarrow\)I like durians very much and so does my father

3. wash/more/future/must/the spinach/carefully/you/in

\(\Rightarrow\)You must wash the spinach more carefully in future

4. gave/some/him/better/Ba/to make/feel/Dr Lien/medicine

\(\Rightarrow\)Dr Lien gave Ba some medicine to make him feel better

5. you/feel/hungry/you/gives/and/sugar/less/energy

\(\Rightarrow\)Sugar gives you energy and you feel less hungry

6. went/the/stomachache/the doctor’s/an/Lan/because/awful/to/had

\(\Rightarrow\)Lan went to the doctor’s because she had an stomachache

7. have/the farm/often/them/vegetables/from/dirt/on

\(\Rightarrow\)Vegetables often have dirt from the farm on them

I am interested in read book in my free time

Lỗi sai: read\(\Rightarrow\)reading

How heavy is the chicken?

-> What is the weight of the chicken?

1.After dinner the neighbors gathered together in the front of yard to watch TV

in the front of yard\(\rightarrow\)in front of the yard

2.He was sounding very angry on the phone

sounding\(\rightarrow\)sound

3.She asked us learned new words immediately before we left class

learned\(\rightarrow\)to learn