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计算
(1)(12a3-6a2+3a)÷3a
(2)5x2(x+1)(x-1)
人气:286 ℃ 时间:2020-02-04 01:37:20
解答
(1)(12a3-6a2+3a)÷3a=4a2-2a+1;
(2)5x2(x+1)(x-1)=5x2(x2-1)
=5x4-5x2
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