9^(log3 2)-2^(1+1/2log2 5)
=(3^2)^(log3 2)-2×2^(1/2log2 5)
=3^(2log3 2)-2×2^[log2 5^(1/2)]
=3^[log3 2^2]-2×5^(1/2)
=2^2-2*根号5
=4-2根号5