The function is
.
Step 1: Rewrite the function as an equation relating
and
.
.
Step 2: Exchange
and
in the equation.
.
Step 3: Solve the equation for
.
(Inverse of
)
(Divide each side by
)
(Cancel common terms)
(Take square root on each side)
(Cancel square and terms)
Step 4: Replace
with
.
.
The inverse of
is
.
The graph of
is the reflection of the graph of
in the line
.
Graph:
\Graph the functions
and
.

The inverse function is
.
Graph of the functions
and
are
.