(х-3)^2-x(x+2.7)=9

помогите пожалуйста 

Готовлюсь к ДПА по математике и не помню как решить. Вопрос вообще легкий. Но сомневаюсь в решении. Подскажите. Нужно представить степень а(в степени -4) в виде дроби. Объясните пожалуйста как это решается?

отношение R : " число x на 3 меньше числа y " задано на множестве X =( 8;2;1 1;5) постройте график этого отношения

Раздел 2.

№1

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An American in Japan

As you known the Japanese are very polite people. Here is a story about an American who was travelling in Japan.

One day he stayed at the hotel for the night. He wanted to get up very early the next morning as he had some very important work to do. That was why he ordered a Japanese who worked at the hotel to wake him up at six o’clock/

“Don’t forget, please”, he said.

At six o’clock the Japanese came into the American’s room and saw that he was still fast asleep. The Japanese was too polite to wake him up, so he took a sheet of paper and wrote a few words on it. He left the note on the telephone table and went out of the room.

The American woke up at 11 o’clock, looked at the clock on the wall and then saw the note on the table. He was very angry when he read: “Dear sir, it is six o’clock now. Please get up at once”.

Words: an American – американец

Japan – Япония

A Japanese – японец

Polite – вежливый

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Are the Japanese very polite people?

Where was an American traveling?

Where did the American stay?

Why did he want to get up early?

Whom did he ask the wake him up?

What di the Japanese do at six o’clock in the morning?

What did the American see when he woke up at 11 o’clock?

№2

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A clever boy

One day a boy who was cleaning shoes in the street saw a young man and said:

“Let me clran your shoes for you”

“No,” the young man answered, “I don’t want you to clean my shoes”.

«I don’t ask much money for my work,” said the boy. “I clean shoes very well”.

“No,” the young man said.

“But I want to clean your shoes,” said the boy. “Don’t give me any money for my work. I’m going to clean them for nothing.”

“All right,” said the young man, “clean my shoes.”

The boy began to clean one of the young man ‘s shoes. Soon it was shining brightly. Then the boy stopped cleaning and refused to clean the other shoe.

“you must give me some money for my work if you want me to clean the other shoe,” he said.

“No,” the young man refused and went away. But soon he understood that it is not good to be in the street with one shoe clean and the other shoe not clean. The people in the street looked at him and laughed. He went back to the boy , gave him the money and told him to clean other shoe. In a very short time his shoes shone brightly.

Words: to clean shoes – чиститьтуфли

For nothing – бесплатно

To shine (shone, shone) – блестеть

Brightly – ярко

To refuse – отказаться

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What did the boy do in the street.

Did the young man want the boy to clean his shoes?

The boy said he wouldn’t take any money for his work, didn’t he?

The boy began to clean one of the young man’s shoes, didn’t he?

Why did the boy refuse to clean the other shoe?

What did the young man have to do?

Do you think the boy is clever?

№3

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She wanted to buy the Zoo

A rich woman came to London one day. She had three children – two boys and girl. They ran and jumped and shouted all day. They never did what their mother wanted them to do.

When they were in London, the children said to their mother:

“Take us to the Zoo”. They look at the animals, and they had a nice time. They liked the Zoo. In the evening they said to their mother:

“You are rich. Buy the Zoo for us.”

“All right,” the mother said.

In the morning they all went to the Zoo again and the mother asked the Zoo people:

“How much does the Zoo cost? My children like it. I want to buy it for them”.

The Zoo people did not like the woman. They did not like her children. And they said:

“We can’t sell the Zoo. We can’t sell the animals. But we can buy you children for the Zoo”

Words: rich – богатый

To jump – прыгать

To shout – кричать

Never – никогда

They had a nice time – онихорошопровеливремя

How much does the Zoo cost? – сколькостоитзоопарк?

To sell – продавать

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Who came to London one day?

Where did the children want to go?

Did they like the Zoo?

What did they want their mother to do?

Was their mother rich?

Did the Zoo people like the woman and her children?

What was they answer?