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初中数学：a-b=2，ab=3怎么求a4+b4的值？完全平方公式，学浪计划
初中数学：a-b=2，ab=3怎么求a4+b4的值？完全平方公式培优考题
初中数学，完全平方公式，基础训练，培优专题104/139
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