State the Domain of the Given Function $y=\frac{(x+3)(x-3)}{x^{2}+9}$ A) $(-\infty, \infty)$ B) $(-\infty, 3)$

Multiple Choice

State the domain of the given function.
- $y=\frac{(x+3) (x-3) }{x^{2}+9}$

A) $(-\infty, \infty)$
B) $(-\infty, 3)$ or $(3, \infty)$
C) $(3, \infty)$
D) $(-\infty, 3)$