(3x²y-xy²+2xy)/二分之一xy

问题描述:

(3x²y-xy²+2xy)/二分之一xy

=2xy(3x-y+2)/xy
=6x-2y+4

原式=3x²y/(1/2xy)-xy²/(1/2xy)+xy/(1/2xy)
=6x-2y+2