Answer the Question $x$ In the Rational Expression $\frac { x - 1 } { x ^ { 2 } - 1 }$

True/False

Answer the question.
-If 1 is substituted for $x$ in the rational expression $\frac { x - 1 } { x ^ { 2 } - 1 }$ , 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 $x = 1$ ? Explain why or why not.