Question

Помогите с 1 заданием и все. Буду благодарен

Answer 1

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