Предмет: Алгебра, автор: ксю20001

упростите выражение:
1) 2а(3а-5)-(а-3)(а-7)
2) (с+3)(5-с)-3с(1-с)

Ответы

Автор ответа: nastasiya98
6
1)6a-10a-(a²-7a-3a+21)=6a-10a-a²+7a+3a-21=-a²+6a-21
2)5c-c²+15-3c-3c+3c²=2c²-c+15
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Русский язык, автор: malioksa
закончите сложноподчиненные предложения используя союзные слова: который ,когда, чей, такой, откуда ,куда.
Мы подошли к старинному дому, ... . Улица, ... , была широкой . Группа туристов стояла возле музея АС Пушкина, ... . В Молдове много живописных мест, ... . В каждом городе есть площадь, ... .На берегу Днестра стоит Сорокская крепость, ... . Мы подошли к избушке , ... .
1 год назад
Предмет: Українська мова, автор: ira14051
Розібрати слова за будовою навкруги
1 год назад
Предмет: Английский язык, автор: Аноним
ответить на вопросы по тексту.
CONTINENTS AND COUNTRIES

The planet we live on is the Earth. There are four oceans and six continents on the Earth. The continents are: Europe and Asia, Africa, Australia, North America and South America. The continents are very large. There are usually many countries on the continents. Russia, Great Britain, France, Germany, Spain, Italy are in Europe. China, India, Vietnam are in Asia. Canada and the United States are in America. Egypt is an African country. The largest country in the world is Russia. The smallest country is the Vatican.

People of different nationalities live in these countries. They speak different languages. Each country has its national flag and its own traditions and symbols.

English is the most popular language nowadays. People use it all over the world because it’s an international language.

In the UK, the USA, Canada, Australia and New Zealand people use English as their native language. These are English-speaking countries.

The capital of the UK is London. There are four parts in the UK: Scotland, Wales, England and Northern Ireland. The Union Jack is the flag of the UK. The capital of the USA is Washington DC. The Americans speak American English.The capital of Canada is Ottawa. The Canadians speak English and French. The capital of Australia is Canberra. There is only one country in Australia. It has got the same name as the continent. Australia is a very big country. The capital of New Zealand is Wellington. The New Zealanders are very friendly people and Wellington is very beautiful. It has got places for shopping and buying souvenirs.

Answer the questions according to the text “Continents and Countries”

1) How many continents and oceans are there on the Earth?

2) What countries are named in the text?

3) What continents are named in the text?

4) What are the largest and smallest countries in the world?

5) What language is an international?

6) What countries are English speaking countries? Why?

7) What is the capital of the UK, the USA, Canada, Australia and New Zealander?



1 год назад
Предмет: Математика, автор: temarey93
решите задачу сумма двух чисел равна 35, а разность этих чисел равна 3. найдите эти числа решите пж
7 лет назад
Предмет: Алгебра, автор: Qшник
sin(x)+cos(x)+sin(x)*cos(x)=1
x-?
7 лет назад