Question

Помогите с 1 заданием и все. Буду благодарен

Answer 1

$= ( \frac{x - 2}{ {x}^{2} - 2x + 4} - \frac{2x - 5}{(x + 2)( {x}^{2} - 2x + 4)} ) \times \frac{3( {x}^{2} - 2x + 4) }{1 - x} = \frac{(x - 2)(x + 2) - 2x + 5}{(x + 2)( {x}^{2} - 2x + 4) } \times \frac{3( {x}^{2} - 2x + 4) }{1 - x} = \frac{ {x}^{2} - 4 - 2x + 5 }{(x + 2)( {x}^{2} - 2x + 4)} \times \frac{3( {x}^{2} - 2x + 4) }{1 - x} = \frac{(x - 1) ^{2} }{x + 2} \times \frac{3}{1 - x} = \frac{3(1 - x)}{x + 2}$