SOLUTION: If p+q=n and {{{1/p +1/q =m}}}, where p and q are positive, find {{{(p-q)^2}}}.

You are given

p + q = n,

m =  =  = ,   (  <<<---=== I replaced p+q in the numerator by n, since it is given !  )


which implies  pq = n/m.


Then   =  = .


Answer.  Then   = .