2) Simplify the expression \( \frac{x^2 - 9}{3x - 9} \).

\( \frac{x^2 - 9}{3x - 9} = \frac{(x - 3)(x + 3)}{3(x - 3)} = \frac{x + 3}{3} \) (assuming \( x
eq 3 \)).