# Precalculus Examples

, ,
Set up the composite result function.
Evaluate by substituting in the value of into .
Solve to find the values of that make undefined.
Set up the equation to solve for .
Take the square root of both sides of the equation to eliminate the exponent on the left side.
The complete solution is the result of both the positive and negative portions of the solution.
Simplify the right side of the equation.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
is equal to .
The domain is all values of that make the expression defined.