How do I find the inverse of the first function ?

A function is given to us , and we need to find its inverse. So the function is ,

So , firstly replace x with y in the given function and then solve for y to get its inverse . Taking the given function ,

Here I have also attached the graph of , x² + 2x - 4 and √(x+5) - 1. Here blue graph is of √(x+5) - 1 & red of x²+2x-4.