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)-八年级数学

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)-八年级数学

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:中档来源:同步题

答案

A

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