Предмет: Алгебра, автор: cerkasovadzumana

Вычисли рациональным способом значение
Выражения​

Приложения:
m11m: 9/200

Ответы

Автор ответа: Аноним
0

Сумма кубов:

а³ + в³=(а + в)(а² - ав + в²)

Разность квадратов:

а² - в²=(а-в)(а+в).

-----------------------------

1) 37³ + 12³=(37 + 12)(37² - 37*12 + 12²)

2) (37 + 12)(37² - 37*12 + 12²) / (37² - 37*12 + 12²)=49

3) 49 - 4=45  -  это скобка.

4) 35² - 15²=(35-15)(35+15)=20 * 50

5) 45 : (20*50)=45/(20*50)=9/(20*10)=9/200  -  это ответ.

cerkasovadzumana: спасибо
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