Question

F(x)=−x 2 −4x−19 find f(-9)

Answer 1

Answer= Let f" role="presentation">ff be the function defined by

f(x)=x2−4x" role="presentation">f(x)=x2−4xf(x)=x2−4x

for x≥2" role="presentation">x≥2x≥2. Find the inverse function indicating its domain and the range.

When I try to make x" role="presentation">xx the subject I get +" role="presentation">++and −" role="presentation">−− two answers for the inverse function. Is it the proper answer? The answer I got is

x=2±y+4." role="presentation">x=2±y+4−−−−√.x=2±y+4.

Is it correct and how do I determine the domain and range of the function? Thanks