(x-3)/(xy-x^2)-(3-y)/(xy-y^2)

Question

(x-3)/(xy-x^2)-(3-y)/(xy-y^2)

Answer 1

файл

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Answer 2

(х-3/xy-x^2) -(3-y/xy-y^2)=(x-3/x(y-x))- (3-y/y(x-y))=xy-3y+3x-x/xy(y-x)=3x-3y/xy(y-x)=-3(x-y)/ xy(x-y)=-3/xy