Replace with .
Interchange the variables.
Solve for .
Since is on the right side of the equation, switch the sides so it is on the left side of the equation.
To remove the radical on the left side of the equation, square both sides of the equation.
Simplify the left side of the equation.
Remove parentheses around .
Solve for and replace with .
Replace the with to show the final answer.
Set up the composite result function.
Evaluate by substituting in the value of into .
Pull terms out from under the radical, assuming positive real numbers.
Since , is the inverse of .