Question

Write the inverse of function x ↦ 4 - x

Answer 1

Answer:

Let f be the function defined by

f(x)=x2−4x

for x≥2. Find the inverse function indicating its domain and the range.

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

x=2±y+4−−−−√.