Jika m-n=b dan n×m=2 maka hasil dari 1/m-1/n

m-n = b
m = b + n
mn = 2
(b+n) n = 2 m = b+(2/(b+n))
n = 2/(b+n) = (b² +bn +2) / (b+n)

1/m - 1/n = (b+n) / (b² +bn + 2) - (b+n) / 2
= 0