Jika 2 log 3 = X dan 2 log 5 = Y,nilai 2 log 450

Log 3 = x log 2 Dan log 5 = y log 2
²log 450 = log 450/log2
=log (2×225)/log 2
=(log 2 + 3log5)/log2
=(log2 + 3y log2)/log2
=1+3y