x^2-2xy+y^2除以x-y等于多少
问题描述:
x^2-2xy+y^2除以x-y等于多少
答
x^2-2xy+y^2=(x-y)²
x^2-2xy+y^2除以x-y=(x-y)²/(x-y)=(x-y)
不懂再问哦