题目内容
【题目】分解因式:1-x2+2xy-y2=______.
【答案】(1-x+y)(1+x-y).
【解析】试题解析:1-x2+2xy-y2,
=1-(x2-2xy+y2),
=1-(x-y)2,
=(1-x+y)(1+x-y).
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题目内容
【题目】分解因式:1-x2+2xy-y2=______.
【答案】(1-x+y)(1+x-y).
【解析】试题解析:1-x2+2xy-y2,
=1-(x2-2xy+y2),
=1-(x-y)2,
=(1-x+y)(1+x-y).