Question

Упростите выражение​

Answer 1

Ответ:

-2

Объяснение:

4x/x-1 * - (x-1) *1/2x

Answer 2

$( \frac{x + 1}{x - 1} - \frac{x - 1}{x + 1} ) \div \frac{2x}{1 - {x}^{2} } = \\ = \frac{{(x + 1)}^{2} - {(x - 1)}^{2} }{ {x}^{2} - 1 } \times \frac{ - ( {x}^{2} - 1)}{2x} = \\ = - \frac{{(x + 1)}^{2} - {(x - 1)}^{2} }{2x} = \\ = - \frac{ {x}^{2} + 2 + 1 - {x}^{2} + 2 - 1 }{2x} = \\ = - \frac{4}{2x} = - \frac{2}{x}$