Предмет: Алгебра, автор: Gell12

Вычислите, используя формулы сокращённого умножения: a) 234²-233² б)139²+2*139*61+61² г)159²-2*159*59+59²

Ответы

Автор ответа: 233334
0
а)234²-233²=(234-233)*(234+233)=1*467=467
б)139²+2*139*61+61²=(139+61)²=200²=40000
г)159²-2*159*59+59²=(159-59)²=100²=10000
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: miguskin354
Chapters 1-3

Before you read

1 Read the Introduction. Which country did L.M. Montgomery come

from? What do you know about this country? What are the most

important cities? Which other places do people visit?

2 Find the words orphan and orphanage in your dictionary. Do you

know any stories about an orphan?

3 Find these words in your dictionary. They are all in the story. What

are they in your language?

buggy carrot heart rude surprise

After you read

4 What happens first? Number these 1-6.

a Mrs. Lynde says unkind things about Anne.

b Marilla takes Anne back to Green Gables.

c Mrs. Spencer goes to the orphanage.

d Anne says sorry to Mrs. Lynde.

e Matthew meets Anne at the station.

f Marilla and Anne visit Mrs. Spencer.

5 Are these sentences right or wrong? Change the wrong

sentences.

a The name of Mrs. Lynde's house is Green Gables.

b Matthew is Manila's husband.

c The color of Anne's hair is black.

d Marilla asks Mrs. Spencer for an orphan girl.

e Mrs. Blewett isn't very kind to her children.

f Anne is rude about Mrs. Lynde's hair.

Chapters 4-7

Before you read

6 Will Anne be happy at Green Gables? Discuss these questions,

a How can Matthew and Marilla help Anne?

b How can Anne help Matthew and Marilla?

40

7 Find these words in your dictionary.

brooch cordial croup drunk island medicine minister

slate vanilla wine

Which word is it?

a You can put this in a cake.

b You take this when you are sick.

c You can put this on a dress.

d Children wrote on this in school.

e These are drinks.

f This makes children very sick.

g You can find this person in a church.

h You feel happy, and then sick.

i There is water all around it.

After you read

8 Answer these questions about the story.

a Why does Anne tell Marilla a story about the brooch?

b Why doesn't Anne want to go back to school?

c Why is Mrs. Barry angry with Anne?

d What mistake does Anne make with Mrs. Allan's cake?

9 Work with a friend.

Student A: You are Diana. Ask Anne about Mr. and Mrs. Allan's

visit to Green Gables.

Student B: You are Anne. Tell Diana about the cake.

Chapters 8-11

Before you read

10 What will happen next in the story? Discuss these ideas,

a Anne will marry Gilbert Blythe.

b Diana will marry Gilbert Blythe.

c Anne will go away to college.

d Matthew and Marilla will leave Green Gables.

11 Find these words in your dictionary.

concert dye examination poem

Which word goes with:

a college? b music? c color?

41

After you read

12 Finish these sentences.

a Matthew sees Anne in the river,

b Miss Stacy has problems with her eyes,

c Gilbert changes the color of her hair,

d Marilla tries to buy a dress,

e Anne is a very good teacher.

13 Why are these things important to the story?

a a pretty dress c a bottle of dye

b an old boat d the Abbey Bank

Writing

14 Write about Anne. What are the good things about her? What

mistakes does she make?

15 Write about Avonlea and its people. Would you like to live there?

Why (not)?

16 Anne writes letters to her friends from Queen's College. Write a

letter to Matthew and Marilla, or to Diana.

17 At the end of the story, Anne has a conversation with Gilbert

outside Green Gables. Write their conversation.
5 лет назад
Предмет: Литература, автор: roman9432
Кто написал стихотворение Няня ?​
5 лет назад
Предмет: Литература, автор: pchuzhkova
1. Восстанови текст: «Итак, все началось с письма в ________, которое оказалось в ________. В письме на ______языках шла речь о __________ корабля «____________», где капитаном был __________. В живых осталось _________ . Они _______ .» ​
5 лет назад
Предмет: Математика, автор: olga2212
8т-3ц=.....+2300кг.....-6900кг=...кг
9 лет назад
Предмет: Математика, автор: Ольга14141414
Фабрика изготовила 17 524 беличьих и щитинных кисти.Кога в магазин отправили 3 677 и 9 847 белчьих кистей ,то кистей каждого вида осталось поровну.Сколько беличьих кистей осталось на фабрике ?
9 лет назад