Предмет: Математика, автор: improfunxfx

13. Вычислите рациональным способом: 92²-48²
––––––
27²-17²​

Ответы

Автор ответа: manyny06
3

Ответ:

решение смотри на фотографии

Приложения:
improfunxfx: спасибо)
Автор ответа: skr7777
0

92²-48² = (92-48)*(92+48) = 44*140.

27²-17²​ = (27-17)*(27+17) = 44*10

\frac{44*140}{10*44} = \frac{140}{10} = 14

( Спочатку скорочуємо 44 у знаменику і чисельнику , а потім на 10)

(Це за формулою скороченого множення - різниця квадратів)

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