Precalculus Examples

$q (3) = \frac{1}{x^{2} - 9}$

Step 1

Replace the variable $x$ with $3$ in the expression.

$q (3) = \frac{1}{{(3)}^{2} - 9}$

Step 2

Raise $3$ to the power of $2$ .

$q (3) = \frac{1}{9 - 9}$

Step 3

Subtract $9$ from $9$ .

$q (3) = \frac{1}{0}$

Step 4

The expression contains a division by $0$ . The expression is undefined.

Undefined