Ответ:
Объяснение:
(a+b)²/ab - (a-b)²)/ab= (a²+2ab+b²-(a²-2ab+b²)/ab=
=(a²+2ab+b²-a²+2ab-b²)/ab =4ab/ab= 4
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Ответ:
Объяснение:
(a+b)²/ab - (a-b)²)/ab= (a²+2ab+b²-(a²-2ab+b²)/ab=
=(a²+2ab+b²-a²+2ab-b²)/ab =4ab/ab= 4