把x2+2xy+y2-1分解因式的结果是[]A.(x+y+1)(x-y-1)B.(x+y-1)(x-y-1)C.(x+y-1)(x+y+1)D.(x-y+1)(x+y+1)-九年级数学

题目简介

把x2+2xy+y2-1分解因式的结果是[]A.(x+y+1)(x-y-1)B.(x+y-1)(x-y-1)C.(x+y-1)(x+y+1)D.(x-y+1)(x+y+1)-九年级数学

题目详情

把x2+2xy+y2-1分解因式的结果是

[     ]

A.(x+y+1)(x-y-1)
B.(x+y-1)(x-y-1)
C.(x+y-1)(x+y+1)
D.(x-y+1)(x+y+1)
题型:单选题难度:偏易来源:四川省中考真题

答案

A

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