Answer
(g²n - m)/(gm)
Step-by-step explanation
g - m ÷ gn = g - m/gn
Make the equation have the same denominator
g - m ÷ gn = g - m/gn = (ggn)/gn - m/gn
= (g²n)/gn - m/gm
Since they have the same denominator, we can carry out the subtraction on the numerator and then put them under one denominator.
(g²n)/gn - m/gm = (g²n - m)/(gm)