Question

(a-b/b-b-a/a)*b/a-b?

Помогите пожалуйста!​

Answer 1

(a - b/b - b - a/a) • b/a - b = b/a • (a - 1 - b -1) - b = ab/a - b/a - b²/a - b/a - b = ab/a - 2 • b/a - b²/a - b