Which rational expression has the excluded value x=5x = 5x=5 only?
fracxx2−25\\frac{x}{x^2-25}fracxx2−25
fracx−5x−5\\frac{x-5}{x-5}fracx−5x−5
frac1x−5\\frac{1}{x-5}frac1x−5
fracx+5x2−25\\frac{x+5}{x^2-25}fracx+5x2−25