= ( x + y + x - y ) [ ( x + y)^2 - ( x + y )(x-y) + ( x-  y )^2 ] + x^2 - y^2 

= 2x ( x^2 + 2xy + y^2 - x^2 + y^2 + x^2 - 2xy + y^2 ) + x^2 - y^2 

= 2x ( x^2 + 3y^2 ) + x^2 - y^2 

= 2x^3 + 6xy^2  + x^2 - y^2 

Mrs Thanh is (1) ___in_______ a supermarket now. She wants to cook potato soup for dinner, so she needs (2) ___some_______ beef and potatoes. She buy (3) ___half_______ a kilo of beef and five potatoes. She also buys some onions and a (4) _____can_____ of peas. Now she is paying (5) _____at_____ the counter. They all (6) ____cost______ two hundred thousand dong.

1. Where is Mrs Thanh?

Mrs Thanh is in a supermarket.

2. What does she need?

She needs some beef and potatoes.

3. How much beef does she buy?

She buy half a kilo of beef.

4. How many potatos does she buy?

She buys five potatoes.

5. Does she buy anything else?

Yes, she does

6. What is she doing now?

Now she is paying at the counter.

7. How much do all the items cost?

They all cost two hundred thousand dong.

2¹⁵⁰=(2³)⁵⁰=8⁵⁰

3¹⁰⁰=(3²)⁵⁰=9⁵⁰

8⁵⁰<9⁵⁰=>2¹⁵⁰<3¹⁰⁰

vậy 2¹⁵⁰<3¹⁰⁰

Giới thiệu về bản thân (Introduce myself)

Hi everybody. My name is Khang. I'm 14 years old. I'm a student at Song Ho secondary school and I'm in grade 8. I live with my family in a small house. There are 4 people in my family: My parents, my younger brother and me. My hobbies are watching TV, reading novels,... I want to be an English teacher in the future.

You don't have to join a gym to get exercise. Depending on your interests you can purchase inexpensive equipment for improving muscle strength, endurance, flexibility, aerobic capacity, fat burning, core training and the like. I recommend an exercise ball, and yoga mats for stretching. Pilates equipment for floor work, a small weight set, and abdominal exercisers are also a good investment. Hydrotherapy has been used by many cultures worldwide to purify and cleanse. From Native American sweat lodges, to Scandinavian saunas, to California hot tubs. Indulge in water therapy to cleanse and refresh body and soul. Saunas purify your blood and can help you relax. You can purchase a small sauna or hot tub for your home. You are what you eat; therefore you can only create the body you want when you fuel yourself with food that is good for you. Find food grown locally. Daily servings of vegetables, and food grown without pesticides are best. Take a daily walk. Walking burns fat, and boosts your mood as well as your metabolism. Walking will also get you outside, where you can enjoy nature and experience your neighborhood. Conscious breathing centers your mind, develops focus, and calms the nervous system. Drink plenty of water. Your body is made of over 80% water. Water cleans your blood, floats your brain and burns fat! Drink plenty of fresh water every day.
Sleep is when your body grows, your body heals, and your mind dreams, relaxes and organizes. To encourage healthy sleep,

Tết Nguyên Đán, more commonly known by its shortened name Tết, is the most important and popular holiday and festival in Vietnam. It is the Vietnamese New Year marking the arrival of spring based on the Lunar calendar. The name Tết Nguyên Đán is Sino-Vietnamese for Feast of the First Morning.

It takes place from the first day of the first month of the Lunar calendar (around late January or early February) until at least the third day. During Tết, Vietnamese visit their relatives and temples, forgetting about the troubles of the past year and hoping for a better upcoming year. Due to the high regard in which people hold it, Tết, as often as not, is consumed with unique, distinctive colors and flavors.

Where is the bank?

-> Could you tell me where the bank is?

Sắp xếp các từ theo đúng trật tự.

1. has / oval / eyes / Mai / black / face / an / and / big.

Mai has an oval face and big black eyes.

2. like / bar / I / toothpaste / tubes / of / would / two / a / soap / and / of.

I would like two tubes of toothpaste and a bar of soap.

3. bread / your / does / father / want / much / for / breakfast / how / his?

How much bread does your father want for his breakfast?

bài 2:using these words to make question with ''why'' and answer:

1.he /be scared?/hate the sound of the drill

Why is he scared?

Because hr hates the sound if the drill.

2.children/often have toothache?/eat lots of candy

Why do children often have toothache?

Because they eat lots of candy.

3.you /be late for class yesterday?/miss the first bus

Why were you late for class yesterday?

Because I missed the first bus.

4.her tooth/hurt?/have a cavity

Why is her tooth hurt?

Because it has a cavity.

5.they/not come to the meeting last night?/be busy

Why didn't they come to the meeting last night?

Because they were busy.

6.she/go to the doctor ?/have a headache

Why does she go to the doctor.

Because she have a headache.

7.Minh/not say anything/yesterday?/be very nervous

Why didn't Minh say anything yesterday?

Because he was nervous.

8.we/brush our teeth after meals?/want to have healthy teeth

Why do we brush our teeth?

Because we want to have heathy teeth.

1. Sport involves individual skills. In game, it is the collective responsibility of a team
2. Sport is based on physical energy and game based on mental strength.
3. Game relies on strategy, sport is based on individual performances and luck.
4. Sport is an activity or activities where the material capabilities of the sportsperson are looked upon. It is the entire performance of the players that determines the winner in a game.