Question

помогите с упрощением выражения

Answer 1

$\frac{y+x}{x} - \frac{x-y}{x^3} * \frac{x^3-x^2y}{y-x} =\frac{y+x}{x} - \frac{x-y}{x^3} * \frac{x^2(x-y)}{-(x-y)}=\frac{y+x}{x}- \frac{-1}{x} *(x-y)= \\ \\ =\frac{y+x}{x}+ \frac{x-y}{x} = \frac{y+x+x-y}{x} = \frac{2x}{2} =2$