Упростите выражение: x^2/x(x-3)+9/x(3-x).

\[\frac{x^{2}}{x(x - 3)} + \frac{9}{x(3 - x)} =\]

\[= \frac{x^{2}}{x(x - 3)} - \frac{9}{x(x - 3)} =\]

\[= \frac{x^{2} - 9}{x(x - 3)} = \frac{(x - 3)(x + 3)}{x(x - 3)} =\]

\[= \frac{x + 3}{x}.\]