Question

Свыражения ((у+х)/-у)/х^3)*((х^3-х^2*у)/y-x) зарание

Answer 1

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