Question

Спростіть вираз (картинка):

Answer 1

1)(a+5b)/a(a-5b)-(a-5b)/a(a+5b)=
=(a²+10ab+25b²-a²+10ab-25b²)/a(a²-25b²)=
=20ab/a(a²-25b²)=20b/(a²-25b²)
2)20b/(a2-25b²)*(25b²-a²)/5b²=-4/b

Answer 2

Дякую!