Find All Values of the Variable for Which the Rational $\frac { x ^ { 2 } - 36 } { x ^ { 2 } - 14 x + 45 }$

Multiple Choice

Find all values of the variable for which the rational expression is undefined.
- $\frac { x ^ { 2 } - 36 } { x ^ { 2 } - 14 x + 45 }$

A) $- 5 , - 9$
B) $- 5,9$
C) $- 9,5$
D) 5,9