Decide What Values of the Variable Cannot Possibly Be Solutions $$\frac { 5 } { x ^ { 2 } - 4 } - \frac { 3 } { x ^ { 2 } + 5 x + 6 } = \frac { 3 } { x ^ { 2 } + x - 6 }$$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$\frac { 5 } { x ^ { 2 } - 4 } - \frac { 3 } { x ^ { 2 } + 5 x + 6 } = \frac { 3 } { x ^ { 2 } + x - 6 }$$

A) $\{ - 3 , - 2,2 \}$
B) $\left\{ \frac { 27 } { 5 } \right\}$
C) $\{ 15 \}$
D) $\{ 7 \}$