-1/3x²y²+xy=( )(xy-3)

问题描述:

-1/3x²y²+xy=( )(xy-3)

-1/3x²y²+xy=xy(-1/3xy+1)
=1/3xy(-xy+3)
=-1/3xy(xy-3)

-1/3x²y²+xy
=xy[(-1/3)xy+1]
=xy*(-1/3)*(-3)[(-1/3)xy+1]
=(1/3)xy*(xy-3)