问题补充:
(x-y)2-(y-x)因式分解的结果是A.(y-x)(x-y)B.(x-y)(x-y-1)C.(y-x)(y-x-1)D.(x-y)(y-x-1)
答案:
C
解析分析:先把原式变形,再提取公因式(y-x),然后分解因式即可.
解答:根据题意得:(x-y)2-(y-x)=(y-x)2-(y-x)=(y-x)(y-x-1).故
(x-y)2-(y-x)因式分解的结果是A.(y-x)(x-y)B.(x-y)(x-y-1)C.(y-x)(y-x-1)D.(x-y)(y-x-1)
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