Question

Let f(x) = x2 – 16. Find f–1(x).

Answer 1

assuming that x2= x^2 and (f-1)(x)

f(x) = x^2 -16
(f-1)(x) = x^2-x-16

Answer 2

to find an inverse, a good trick is to swap out x and y and resolve for y

Answer 3

y = x^2 - 16 ; swap out x and y

x = y^2 - 16

resolve for y