What is the vertical asymptote of f(x)=2x−6x2−9f(x) = \frac{2x - 6}{x^2 - 9}f(x)=x2−92x−6?
x=3x = 3x=3
x=−3x = -3x=−3
x=0x = 0x=0
x=2x = 2x=2