============================================================. Created by Akula17. algebra-ru

4x^4/(x^2-y2) : 2x/(x+y) = 4x^4/(x^2-y2) * (x+y)/ 2x = 2x^3/(x-y) при х=-2 и у=-104x^4/(x^2-y2) : 2x/(x+y) = 2x^3/(x-y) = 2*(-2)^3/((-2)-(-10)) =2*(-8)/(-2+10) = -2