Разложите на множители: 3b+bc+3ac+9a - №7124905

Разложите на множители:
3b+bc+3ac+9a
- Предмет:
  Алгебра
- Автор:
  sassienekw
- 6 лет назад

Ответы 2

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- Автор:
  welch
- 6 лет назад
- 0
3b+bc+3ac+9a=b(3+c)+3a(c+3)=(3a+b)(3+c)
- Автор:
  virginia42
- 6 лет назад
- 0
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способом сложения.
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помогите перевести
The geography of the Russian Federation entails the physical and human geography of . Comprising much of Eastern Europe and Northern Asia, it is the world's largest country in total area. Due to its size, displays both monotony and diversity. As with its topography, its climates, vegetation, and soils span vast distances. From north to south the East European Plain is clad sequentially in tundra, taiga, mixed and broad-leaf forests, steppe, and semi-desert as the changes in vegetation reflect the changes in climate. Siberia supports a similar sequence but is taiga. The country contains 40 UNESCO Biosphere reserves.
Located in the northern and middle latitudes of the Northern Hemisphere, most of Russia is much closer to the North Pole than to the equator. The country's 17.1 million square kilometers include one-eighth of the Earth's inhabited land area.
Extending for 57,792 kilometers, the Russian border is the world's longest, a source of substantial concern for national security in the post-Soviet era. Along the 20,139-kilometer land frontier, Russia has boundaries with fourteen countries. These "neighbors" are Kazakhstan, Estonia, Latvia, Lithuania, Belarus, Ukraine, Georgia Abhazia, South Osetia and Azerbaijan. The remaining bordering countries are North Korea, China, Mongolia, Poland, Norway, and Finland. And, at the far northeastern extremity, only eighty-six kilometers of the Bering Strait separate Russia from a fifteenth neighbor—the United States, coming with in 4 km in the Diomede Islands.
Approximately 2/3 of the frontier is bounded by water. Thirteen seas and parts of three oceans—the Arctic, Atlantic, and Pacific—wash Russian shores. Russia is the largest country in the world.
With a few changes of status, most of the Soviet-era administrative and territorial divisions of the Russian Republic were retained in constituting the Russian Federation. In 2006, there were eighty-eight administrative territorial divisions (called federal subjects): twenty-one republics, seven territories, forty-eight provinces, one autonomous area and nine autonomous districts. The cities of Moscow and Saint Petersburg also have federal status.
Geographers traditionally divide the vast territory of Russia into five natural zones: the tundra zone; the taiga, or forest, zone; the steppe, or plains, zone; the arid zone; and the mountain zone.
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Russia is a water-rich country. The earliest settlements in the country sprang up along the rivers, where most of the urban population continues to live. Russia has thousands of rivers and inland bodies of water, providing it with one of the world's largest surface-water resources. Forty of Russia's rivers are longer than 1,000 kilometers. The Volga, Europe's longest river, is by far Russia's most important commercial waterway.
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