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初中数学：若x根号x-7=0，怎么求x的值？二次根式性质，学浪计划
初中数学：若x根号x-7=0，怎么求x的值？二次根式性质基础训练
实数，无理数，平方根，立方根，二次根式，常考题培优专练251/419
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