-1/2x^3y+1/4x^2y^2-2/8x^3y^3
问题描述:
-1/2x^3y+1/4x^2y^2-2/8x^3y^3
答
-1/2x^3y+1/4x^2y^2-2/8x^3y^3
=-1/4 x^2y (2x-y+xy^2)