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x方y方-x方-y方+1因式分解
人气:177 ℃ 时间:2020-05-09 14:20:39
解答
x方y方-x方-y方+1
=x²(y²-1)-(y²-1)
=(y²-1)(x²-1)
=(x+1)(x-1)(y+1)(y-1)
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