Precalculus Examples
,
Step 1
Step 1.1
Replace the function designators with the actual functions in .
Step 1.2
Simplify.
Step 1.2.1
Simplify the numerator.
Step 1.2.1.1
Rewrite as .
Step 1.2.1.2
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 1.2.2
Cancel the common factor of .
Step 1.2.2.1
Cancel the common factor.
Step 1.2.2.2
Divide by .
Step 2
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
Interval Notation:
Set-Builder Notation:
Step 3