Question

упростить $2-2x\\ x^{2} -2x+1$

Answer 1

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

Answer 2

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