Question

упростите выражение (1/y-1/x+y):x/y

Answer 1

$( \frac{1}{y} - \frac{1}{x} + y) \div \frac{x}{y} = ( \frac{x}{xy} - \frac{y}{xy} + \frac{x {y}^{2} }{xy} ) \times \frac{y}{x} = \frac{x - y + x {y}^{2} }{xy} \times \frac{y}{x } = \frac{x - y + x {y}^{2} }{ {x}^{2} }$