What is the inverse of f (x) = x^2+5 and is it a function?

Answer:hello:

let : y = f (x)

you have : y = x² + 5

calculate : x

x² = y - 5

x exsit for : y - 5 ≥ 0

if : x ≥ 0 x = √ (y - 5) so the inverse functio for f is : g (x) = √ (x - 5)

if : x ≤ 0 x = - √ (y - 5) so the inverse functio for f is : h (x) = - √ (x - 5)