Предмет: Математика, автор: semochcka2001

Решите плз
(a - 1)(b + 1) - (a + 1)(b - 1), если a - b = 1

Ответы

Автор ответа: lily0506

0

a*b-b+a-1-a*b-b+a+1=2a-2b=2*(a-b)= 2

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