What is the domain of f(x)=ln(x2−9)f(x) = \ln(x^2 - 9)f(x)=ln(x2−9)?
x<−3x < -3x<−3 or x>3x > 3x>3
All real numbers except x=±3x = \pm 3x=±3
−3<x<3-3 < x < 3−3<x<3
x>3x > 3x>3