〔9x^3y^2-6x^2y+xy^2〕÷〔-3xy〕=多少
问题描述:
〔9x^3y^2-6x^2y+xy^2〕÷〔-3xy〕=多少
答
〔9x^3y^2-6x^2y+xy^2〕÷〔-3xy〕=
-3xy(-3x^2y+2x)+xy^2÷〔-3xy〕=
-3x^2y+2x+xy^2 =
x(y^2-3xy+2)