2x^2y*3xy^2-4xy*(-3xy)^2=

问题描述:

2x^2y*3xy^2-4xy*(-3xy)^2=

2x^2y*3xy^2-4xy*(-3xy)^2
=6x^3y^3-4xy*9x^2y^2
=6x^3y^3-36x^3y^3
=-30x^3y^3