(1/2x²y-2xy+y²)·3xy等于多少?

问题描述:

(1/2x²y-2xy+y²)·3xy等于多少?

(1/2x²y-2xy+y²)·3xy
=3/2x²y²-6x²y²+3xy^3
=-9/2x²y²+3xy^3