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很急!國二數學請問如何配方法?
Nov 25th 2013, 11:13

001
意見者： 還珠客 ( 研究生 1 級 )
擅長領域： 教育政策 | 升學考試
發表時間： 2013-11-26 11:55:44
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如果是-1和5你程式一定有錯，常數項應該是1乘上-5才是。
X^2-4X-5=0
(X-5)(X+1)=0
X=5或X=-1。

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