题型:问答题 简答题 在化简x-yx+y时,甲、乙两位同学的解答如下:甲:x-yx+y=(x-y)(x-y)(x+y)(x-y)=(x-y)(x-y)(x)2-(y)2=x-y乙:x-yx+y=(x)2-(y)2x+y=(x-y)(x+y)x+y=x-yA.两人解法都对B.甲错乙对C.甲对乙错D.两人都错 查看答案