因式分解 -x^3y+xy^3
问题描述：
因式分解 -x^3y+xy^3
答
-x³y+xy³=-xy(x²-y²)=-xy(x+y)(x-y)
答
-x³y＋xy³＝-xy(x²-y²)=-xy(x-y)(x+y)
答
xy（y－x）（y＋x）
答
-x^3y+xy^3 =xy(-x^2+y^2)=xy(x+y)(y-x)
答
=xy^3-x^3y
=xy(y^2-x^2)
=xy(y+x)(y-x)