Y=x^1/2+4

I need the inverse to this its killing me

f (y) = y²-8y+16

Step-by-step explanation:

we are looking for f (y) which basically means x, (inverse)

step1 y=x^1/2+4

2 x^1/2=y-4

3 √x=y-4 / square both sides

4 x = y²-8y+16

*note x presents f (y)