If f(x)=\rtx2−16f(x) = \rt{x^2 - 16}f(x)=\rtx2−16, find the domain of fff.
x\q4x \q 4x\q4 or x\q−4x \q -4x\q−4
−4\qx\q4-4 \q x \q 4−4\qx\q4
x\q4x \q 4x\q4
x>16x > 16x>16