Use the function f (x) = x^2-8 find the inverse of f (x)

Step-by-step explanation:

let : y = x² - 8

calculate : x

x² = y + 8

x exist : y + 8 ≥ 0

x = √ (y + 8) or x = - √ (y + 8)

conclusion:

if : x ≥ 0 the inverse of f (x) is : g (x) = √ (x + 8)

if : x ≤ 0 the inverse of f (x) is : h (x) = - √ (x + 8)