Упростите выражение: (25-3x)/(x-5)^2-(7x-x^2)/(5-x)^2.

\[\frac{25 - 3x}{(x - 5)^{2}} - \frac{7x - x^{2}}{(5 - x)^{2}} =\]

\[= \frac{25 - 3x}{(x - 5)^{2}} - \frac{7x - x^{2}}{(x - 5)^{2}} =\]

\[= \frac{25 - 3x - 7x + x^{2}}{(x - 5)^{2}} =\]

\[= \frac{x² - 10x + 25}{(x - 5)²} = \frac{(x - 5)²}{(x - 5)²} = 1\]