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全国初中数学竞赛题，知a=√7-1，求代数式3 a³+12a²-6a-12值
全国初中数学竞赛题，知a=√7-1，求代数式3 a³+12a²-6a-12值
人教版九年级数学，中考常考易错重要知识点、竞赛、综合压轴题97/133
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