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