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"已知关于x的方程x的平方＋kx＋k＋2等于0的两个根是x1，x2，且x1的平方＋x2的平方＝4，求k的值"

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Hold Me Hailey Baby Doll "Hold Me Hailey" Interactive Baby Doll Makes Five Sounds
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$149.95 US
Singing In The Rain Baby Doll Interactive Baby Doll "Babbles" Like She's Singing
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$179.95 US
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