Set the denominator in equal to to find where the expression is undefined.

Subtract from both sides of the equation.

The domain is all values of that make the expression defined.

Interval Notation:

Set-Builder Notation:

Find the Domain y=4/(x+9)

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# Find the Domain y=4/(x+9)

Set the denominator in equal to to find where the expression is undefined.

Subtract from both sides of the equation.

The domain is all values of that make the expression defined.

Interval Notation:

Set-Builder Notation:

Find the Domain y=4/(x+9)