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x³-4x²-4x-5
人气:335 ℃ 时间:2020-06-12 17:19:12
解答
x³-4x²-4x-5
=x³-1-4x²-4x-4
=(x-1)(x²+x+1)-4(x²+x+1)
=(x²+x+1)(x-1-4)
=(x²+x+1)(x-5)
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