Предмет: Алгебра, автор: луи241203

Докажите ,что значение выражения:
(x²-7xy)-(5-4xy)+(3xy-x²)равно -5

Ответы

Автор ответа: pomoshnik09
0
  =х²-7ху-5+4ху+3ху-х²=-7ху+7ху-5=-5
Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Русский язык, автор: nuriyevaulviyye69
помогите пожалуйста .................​
6 лет назад
Предмет: Английский язык, автор: Elendem1
Задание 1. Try to fill in the chart below for each country, then read the text and check your ideas.


Вrazil is currently undergoing impressive development. This has primarily been fuelled by China’s demand for the country’s raw materials. China is investing heavily to improve Brazil’s infrastructure to facilitate the export of metal ores, timber and food supplies. Currently 50 million Brazilians live in rural and urban poverty. As has happened in China millions of these people will be removed from poverty as the economy develops but just how many will be left behind? Could this disadvantaged section of society be a cause of future social conflict? Brazil is becoming an important global supplier of food, primarily soya beans. However, the Amazon rainforest is being destroyed at an alarming rate. In the future this may lead to drought in the south of the country which could threaten this food production.

Russia: supplies of gas and oil make Russia a formidable hydrocarbon power. Moscow may now be a consumer paradise but the rest of the country lags far behind in terms of economic growth. The country’s legal and political infrastructures need to develop and be reinforced. The country is too dependent on oil supplies and needs to diversify into other sectors, especially IT. Low levels of population growth and a poor healthcare infrastructure pose another threat to the country’s development.

India: last year Infosys, the successful Bangalore-based IT company, received 800 applications for 100 internships for non-Indian nationals. The company received a total of 1 million job applications from qualified Indian graduates. The Indian education system has prepared the country well for its growth in the IT sector. Graduates no longer need to leave India to develop a career. Faith and religion are important in India –will economic growth and increased wealth lead to a decline in religious belief as has happened in Western Europe? The rural poor are rapidly being left behind by urban growth, the government need to address this issue. Drought in the north of the country is an increasing problem that may threaten food supplies.

China: 70% of the clothes bought in the US are now made in China. Consumer electronics, the car industry, the car component industry all are developing rapidly. Multinationals are now opening research facilities in China. Millions of Chinese people have been pulled out of poverty over the last 10 years. The impact of the country’s recent economic growth on the environment has been very high. There is a risk of drought in the north of the country which may threaten supplies of wheat and other grains. The political situation remains uncertain. How will the Communist Party adapt to the demands of the growing affluent middle classes?
6 лет назад
Предмет: Українська література, автор: cxhbhh878t
РОЗТАВИТИ ПОСЛІДОВНІСТЬ ПОДІЙ!
1.Знайомство з Міхою
Голим.
2.Контракт із мадам Бухенбах.
3.Приїзд Івана Сили до столиці.
4.Верховинець знаходить роботу.
5. Міха й Бідосько підкидають сенсацію.
6. Аварія.
7. Поєдинок із Велетом.
8. Іван у доктора Брякуса. 9.Іван Сила у в’язниці.
10. Агент Фікса на вокзалі.
11.Фікса в лікарні читає
газету.
12.Чемпіонат Республіки зі штанги.
6 лет назад
Предмет: История, автор: Yana159753
Хозяйство Могулистана!Помогииите
9 лет назад
Предмет: Математика, автор: GoofyBass
В треугольник ABC вписан параллелограмм BDEF таким образом, что точки Д, E, F лежат на сторонах АВ, АС и BС соответственно. Площади параллелограмма BDEF и треугольника ABC относятся, как 4:9. Найдите стороны параллелограмма, если АВ = 12, ВС=1 8.

P.S. Чертеж есть, по примеру пытаюсь решить, но все время где-то ошибаюсь. Если можно с пояснениями.
9 лет назад