Предмет: Алгебра, автор: IvanTrepyshko2006

Решить уравнение:
(x^2-x+1)(x^2+x+1)

Ответы

Автор ответа: TheCleverOlya
1

Ответ:

х^4 + х^2 +1

Объяснение:

(х^2-х+1)(х^2+х+1)=

=х^2*х^2+х^2*х+х^2*1-х*х^2-х*х-х*1+1*х^2+1*х+1*1=

=х^4 + х^3 + х^2 - х^3 - х^2 - х + х^2 + х + 1=

=х^4 + х^2 +1

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Reading Comprehension
I. Read the text carefully
A Surprise Party for Gerry
He was stuck in bed, a cute card, He was feeling rather miserable, A
dozen gifts, To tease, A spectacular birthday present
Gerry was feeling very sorry for himself. He had broken his leg, and
he was in hospital. He had already been there for three weeks. Worst of
all, it was his thirteenth birthday, and he didn't want to be in hospital
for that. He was stuck in bed, and it was boring, boring, boring.
His birthday had started in the same way as the previous days in
hospital. At half past ten the doctor came to see him.
Happy birthday,
Gerry,
she said,
*Can I look at your cards?" Gerry had received cards
from his family and a cute one from his neighbours, but not one from
his friends. Even Frankie, his best friend, had forgotten him. He was
feeling rather miserable. Maybe they didn't care about him.
At lunch time his mother arrived. She had brought IMdozen gifts tor
Gerry and soon his bed was covered in wrapping Paper. His best
present was a CD player. *Thanks, Mum,
* he said.
"That's just what I
need in here." Things were looking up.
Suddenly there was a lot of noise from outside the door. Then the
door flew open, and his whole class walked in. First, they sang "Happy
Birthday to You"
very loudly and gave him a huge card. Then they
crowded round his bed and looked at all his gifts. Next, Frankie's
mother came in with a big birthday cake and paper plates. After that his
classmates gave him three CDs of his favourite band. Finally, they sat
around his bed and ate birthday cake.
Then Gerry's doctor came in. "We need some peace and quiet in
here.
;" she teased. "How would you like to go home tomorrow?"
-Wow." said Gerry.
"That's a spectacular birthday present,


2 Match.
1. Gerry had been in hospital for
three weeks because
2. He was stuck in bed, so
3. Gerry's family sent him cards,
but
4. His doctor came to see him that
forgotten
morning and
5. His mother came that afternoon
him after all.
6. His classmates had planned
surprise birthday party
7. Gerry was happy because
news.
8. Gerry's doctor came that after-
noon and

a) he felt bored.
b) his friends hadn't sent him
c) gave him a CD player.
d) he had broken his leg.
e)his friends hadn't
f) gave him some
g) saw his cards.
h) brought Gerry a card and
some presents.



Ill. True or False,
1. It was Gerry's thirteenth birthday.
2. Gerry had received a lot of cards and gifts from his family and
neighbours.
3. But Gerry wasn't very happy,
4. Mum gave him a nice mobile phone.
5. His friends didn't come to Gerry's birthday,
6. The doctor said Gerry would go home tomorrow.
IV. Answer the questions.
1. Why was Gerry feeling sorry for himself?
2, How did his birthday start?
3. What did Gerry receive from his family and neighbours?
4. Why wasnt Gerry happy?
5. Who visited Gerry then?
6. What did his classmates give him?

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