You can put this solution on YOUR website! (2m+9)^2 = (2m+9)(2m+9) this is of the form (a+b)^2 remember the answer is a^2 +2ab+b^2 Remember a=2m and b=9
(2m)^2 +2(2m*9) +9^2 so the answer is
4m^2 + 36m + 81 you can FOIL this easily as well
I hope that this helps you