来自孙晓丽的问题
1.6a^3-8a^2-4a2.-x^3y^3-2x^2y^2+xy3.ma-mb+m^2+mn+na+nb
1.6a^3-8a^2-4a
2.-x^3y^3-2x^2y^2+xy
3.ma-mb+m^2+mn+na+nb
1回答
2020-09-16 00:20
1.6a^3-8a^2-4a2.-x^3y^3-2x^2y^2+xy3.ma-mb+m^2+mn+na+nb
1.6a^3-8a^2-4a
2.-x^3y^3-2x^2y^2+xy
3.ma-mb+m^2+mn+na+nb
1.2a(3a^2-4a-2)
2.-(x^3y^3+2x^2y^2-xy)
=-xy(x^2y^2+2xy-1)