b^(4m+2n)=(b^4m)*(b^2n)=1296*25=32400
b^(4m+2n)=(b^4m)*(b^2n)=24*25=600b^m=6,b^4m=(b^m)^4。b^4m=24b^n=5,b^2n=(b^n)^2。b^2n=25