Write the Word or Phrase That Best Completes Each Statement $x$

True/False

Write the word or phrase that best completes each statement or answers the question
-If 8 is substituted for $x$ in the rational expression $\frac{x-8}{x^{2}-64}$ , the result is $\frac{0}{0}$ . Mathematicians have been known to say "Any number divided by itself is 1 ." Does this mean that this expression is equal to 1 for $\mathrm{x}=8$ ? Explain why or why not.