a^2(x-y)+(y-x)因式分解
问题描述:
a^2(x-y)+(y-x)因式分解
答
解
a^2(x-y)+(y-x)
=a^2(x-y)-(x-y)
=(a^2-1)(x-y)
=(a-1)(a+1)(x-y)