Find the Domain Of $f ( x ) = \frac { x ^ { 2 } - 25 } { x ^ { 2 } + 3 x - 40 }$

Multiple Choice

Find the domain of $f ( x ) = \frac { x ^ { 2 } - 25 } { x ^ { 2 } + 3 x - 40 }$ .

A) all real numbers
B) all real numbers except x = -8
C) all real numbers except x = 5 and x = -8
D) all real numbers except x = 8 and x = -5
E) all real numbers except x = -5, x = 5 and x = -8