计算:(x-y)的平方-2x(x-y)
问题描述:
计算:(x-y)的平方-2x(x-y)
答
(x-y)的平方-2x(x-y)
=(x-y)(-x-y)
计算:(x-y)的平方-2x(x-y)
(x-y)的平方-2x(x-y)
=(x-y)(-x-y)