Find the Domain Of $f$ $f ( x ) = \frac { 8 } { 6 x ^ { 2 } + 18 x - 108 }$

Find the domain of $f$ . $f ( x ) = \frac { 8 } { 6 x ^ { 2 } + 18 x - 108 }$

A) $( - \infty , - 6 ] \cup [ 3 , \infty )$
B) $( - \infty , - 6 ) \cup ( 3 , \infty )$
C) $( - \infty , - 6 ) \cup ( - 6,3 ) \cup ( 3 , \infty )$
D) $( - \infty , - 7 ] \cup [ 7 , \infty )$
E) $( - \infty , - 7 ) \cup ( - 7,7 ) \cup ( 7 , \infty )$

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