x^2+5x+25 = X^2+5x+25/4-25/4+25 = (X+5/2)^2 =-75/4,無解

來源: 2022_2092 於 2023-02-02 11:35:51 [舊帖] [給我悄悄話] 本文已被閱讀：次

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