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a^3-5a^2+5a-1(因式分解)
人气:212 ℃ 时间:2020-05-05 15:41:59
解答
a^3-5a^2+5a-1
=(a³-1)-5a(a-1)
=(a-1)(a²+a+1-5a)
=(a-1)(a²-4a+1)
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