$\"\"$

\

The points are $\"\"$ .

\

The distance between two points $\"\"$ is $\"d$

\

$\"d$ (Substitute $\"x$ )

\

$\"d$ (Subtract: $\"minus$ ) $\"\"$

\

$\"d$ (Evaluate powers $\"open$ )

\

$\"d$ (Add: $\"9$ )

\

$\"d$ (Rewrite $\"\"$ )

\

$\"\"$ (Apply product property of square roots: $\"square$ )

\

$\"\"$ (Evaluate power $\"\"$ )

\

$\"\"$ (Cancel square and root) $\"\"$

\

The distance between two points $\"\"$ is $\"3$ units.