\"\"

\

The points are \"\".

\

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

\

\"\" (Substitute \"\")

\

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

\

\"\"                          (Evaluate powers:  \"\")

\

\"\"                                (Add: \"\") 

\

\"\" 

\

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