Найдите значение выражения.
7/(a-a²)-7/a при а=36 7/(36-36²)-7/36=-7/1260-7/36=-1/180-7/36=-1/180-35/180=-36/180=-1/5
7/(36-36²)-7/36=7/(36-1296)-7/36=7/(-1260)-7/36=(-7-7*35)/1260=(-7-245)/1260= - 252/1260= - 1/5