Упростите:x^(3)+y^(3) 2y xy ---------------- : (x^(2)-y^(2)) + ----------- - ----------- x+y x+y x^(2)-y^(2)
X^3+y^3 / x+y : (x^2-y^2) + 2y / x+y - xy / x^2-y^2 = (x+y)(x^2-xy+y^2) / x+y : (x^2-y^2) + 2y / x+y - xy / x^2-y^2 = x^2-xy+y^2 / x^2-y^2 + 2y / x+y - xy / x^2-y^2 = = (x^2-xy+y^2 + 2y(x-y) - xy) / x^2-y^2 = (x^2-2xy+y^2+2xy-2y^2) / x^2-y^2 = = x^2-y^2 / x^2-y^2 = 1