Question

Спасибо заранее!!!!!!!

Answer 1

Ответ:

1

Объяснение:

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