fen jie yin shix^2(x-y)+(y-x)
问题描述:
fen jie yin shix^2(x-y)+(y-x)
答
x^2(x-y)+(y-x)
=x²(x-y)-(x-y)
=(x-y)(x²-1)
=(x-y)(x+1)(x-1)