2*x的3次方y-2x*y的3次方=2xy(x²-y²)=2xy(x+y)(x-y)
2*x的3次方y-2x*y的3次方=2xy(x²－y²)[提取公因式]=2xy(x＋y)(x－y)[平方差公式]希望能帮到你！
2xy(x+y)(x-y)
