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2001的2次方 要运用整式乘法公式计算啊!切记!
人气:488 ℃ 时间:2020-01-27 12:53:43
解答
2001的2次方
=(2000+1)的2次方
=2000的2次方+2×2000+1
=4000000+4000+1
=4004001
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