Answer:
if it is 3m^2 then √74 if you meant (3m)^2 it is √74/3
Explanation:
if the first then you divide 3 from both sides thus getting m^2= 74, and you get m=√74, if second then you get 9m^2 and you divide 9 from both sides and get m^2 = 2.4(8) and you square that to get √74/3