What are all the possible values of a and b that make the equation 12×+24=ax b have no solution

The correct answer is Imagery.

Eliot, differently to authors of his time, uses imagery quite often in his works. In these lines, he mentions arms, and perfume, with references to bracelets and hair, in order to refer to a group of women, who are reoccurring in the poem, while giving the reader a disconnected impression of them.