Hardy Weinberg equilibrium?

The frequencies of the 2 alleles is 0.6 and 0.4, because that is the only combination wihich will give a sum of 1 and a product of 0.24 (since the product of 2[frequency of A][frequency of a] must equal 0.48), but it's not possible to tell which is the frequency of A and which is the frequency of a.