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初中数学:已知x+y=10,xy=3,怎么求x-y的值?完全平方公式考题
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希望杯竞赛题,已知2^x+49=y²,求x,y值,90%同学直接放弃,难
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@{uid:1510322399676196,nick:%E7%88%B1%E7%9A%84
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@{uid:1578022170061106,nick:%E5%A6%84%E6%83%B3%E5%B1%B1%E6%B5%B7}
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BMjAyMzAyMjAxOTUyMzJfMTYzMDU3Mzg3N185NjY2NjE0NDQ0M18yXzM=_hd15_B0b9e5a03aa6a2afc_哔哩哔哩_bilibili
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BMjAyMjExMDgxMTE2MzNfMTYyNjYxMzY3MV84ODIzMDcxMDk4MF8xXzM=_hd15_B1fac0c37bec92b94_哔哩哔哩_bilibili
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BMjAyMjExMDgxMTE3MDJfMTY5MTAwMTk2MF84ODIzMDY5NTM4MV8yXzM=_b_B2c2a49181e0c5214ff4_哔哩哔哩bilibili
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女性二十五岁以后皮肤受地心引力和年龄影响,每天以0.02mm速度下垂,中年女性一定要让头顶头发蓬松起来,这样面部表情比较生动些有柔和度#中年小姐...
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55C6E470-D56E-42B3-86E8-F1ABC8FBDBAE