The process of solving inverse function of square-4 of function y = (x-1)

The process of solving inverse function of square-4 of function y = (x-1)

To find the inverse function of a function is also to solve the equation and find out how much x = y?
The solution is as follows
(x-1)^2=y+4.
( x-1)=±√(y+4)
x=1±√(y+4) (y≥-4)
Traditionally, X is the independent variable and Y is the function,
Therefore, the inverse function of the original function is y = 1 ± √ (x + 4). (x ≥ - 4)