# Find the Domain 1/(x^2-x-6)

Set the denominator in equal to to find where the expression is undefined.
Solve for .
Factor using the AC method.
Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .
Write the factored form using these integers.
Set equal to and solve for .
Set the factor equal to .
Add to both sides of the equation.
Set equal to and solve for .
Set the factor equal to .
Subtract from both sides of the equation.
The solution is the result of and .
The domain is all values of that make the expression defined.
Interval Notation:
Set-Builder Notation:
Find the Domain 1/(x^2-x-6)