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On the problem of power in the first semester of the second grade of junior high school 1. If M + 1 power of 9 - 2m power of 3 = 72, find the value of M (with calculation process) 2. Given that the power a of 2 = m, the power B of 2 = n, find the value of the power 2A + 3b of 2 How to find out the need to explain under the ah... Otherwise it is meaningless

9^(m+1)-3^2m=72
9^(m+1)-9^m=72
(9-1)*9^m=72
8*9^m=72
m=1
2^a=m
2^b=n
2^(2a+3b)=m^2*n^3