因式分解(x-y)^2-(y-x)应为什么啊啊啊啊
问题描述:
因式分解(x-y)^2-(y-x)应为什么啊啊啊啊
答
(x-y)^2-(y-x)
=(x-y)^2+(x-y)
=(x-y)(x-y+1)A. (x-y)(x-y-1)B.(y-x)(x-y-1)C.(x-y)(y-x-1)D(x-y)(y-x+1)给的答案有问题,我算的是对的,你可以用x=1,y=0代进去检验下,(x-y)^2-(y-x)=1-(0-1)=2A是为0,B是为0,C是-2,D是0题目应该是出错了==