Simplify 1−4x21−2x\frac{1 - \frac{4}{x^2}}{1 - \frac{2}{x}}1−x21−x24.
1−2x1 - \frac{2}{x}1−x2
1+2x1 + \frac{2}{x}1+x2
x−2x\frac{x-2}{x}xx−2
x+2x\frac{x+2}{x}xx+2