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初中数学：若a是一元二次方程的根，怎么求a³-3a²-2018a+1的值
初中数学：若a是一元二次方程的根，怎么求a³-3a²-2018a+1的值？
初中数学，解一元二次方程，根的判别式，韦达定理，中考培优真题114/168
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