$\"\"$

The give coordinates are (12, 3), ( $\"\"$ 8, 3).

The distance d between any two points with coordinates $\"\"$ .

Then distance (d) $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

Evaluate powers: $\"\"$ .

$\"\"$ \ \ $\"\"$ (Evaluate square roots: $\"\"$ ) $\"\"$

The distance d $\"\"$ .