## Algebra and Trigonometry 10th Edition

(a) $0$ (b) Impossible: the denominator cannot be equal to $0$.
$\frac{x-2}{x+2}$ (a) $\frac{2-2}{2+2}=\frac{0}{4}=0$ (b) $\frac{-2-2}{-2+2}=\frac{-4}{0}$. Impossible: the denominator cannot be equal to $0$.