Объяснение:
(2(x-y)-(x^2-y^2))/xy(x^2-2xy+y^2)= (x-y)(2-x-y)/xy(x-y)^2=(2-x-y)/xy(x-y)
(a(c-b)+(c-b)^2)/(c(b-a)-(b-a)^2)= (c-b)(a+c-b)/(b-a)(c-b+a)= (c-b)/(b-a)
в) (2-x-y)/xy(x-y)
г) (c-b)/(b-a)
Объяснение:
в) (2(x-y)-(x^2-y^2))/xy(x^2-2xy+y^2)= (x-y)(2-x-y)/xy(x-y)(x-y)=(2-x-y)/xy(x-y)
г) (a(c-b)+(c-b)^2)/(c(b-a)-(b-a)^2)= (c-b)(a+c-b)/(b-a)(a+c-b)=(c-b)/(b-a)
