Предмет: Алгебра, автор: KirillRambo

Установіть відповідність між виразами

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Ответы

Автор ответа: tatsach

Ответ:

Объяснение:

..............

Приложения:

Автор ответа: prettypushkova

1. (2с + b)² = (2c)² + 2 · 2c · b + b² = 4c² + 4cb + b² (В)

2. (с + b)² - 2cb = c² + 2cb + b² - 2cb = c² + b² (А)

3. b² - 9c² = b² - (3c)² = (b - 3c)(b + 3c) (Д)

4. (b + 3a)² - 3a(3a + 2b) = b² + 2 · b · 3a + (3a)² - 9a² - 6ab = b² + 6ba + 9a² - 9a² - 6ab = b² (Б)

Ответ: 1-В; 2-А; 3-Д; 4-Б.

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