Question

(x+y)^2/(x+y)^2-(x-y)^2 : (x/y-y/x)Решите, пожалуйста( ^2-степень, / - деление) 

Answer 1

(x+y)^2/(x+y)^2-(x-y)^2/x/y-y/x=(x^+2xy+y^)2/x^+2xy+y^2-(x^-2xy+y)2/x/y-y/x=2/x^+2xy=y^2 2/x/y-y/x=x^=2xy+y^2/x^-y^/yx=2xyyx=2x^y^