Answer
No solution
Work Step by Step
Original Equation
$\frac{12}{9-a^{2}}$ + $\frac{3}{3+a}$ = $\frac{2}{3-a}$
Multiply equation by the LCD, (3+a)(3-a)
12+3(3-a) = 2(3+a)
Simplify
5a = 15
a = 3
However, a=3 would make the denominator equal to 0 so there is no solution.