a maths...急!!!!!!!

Mandy

2007-12-02 7:34 am

2x^2 + 9│x│-5+0

ans:-1/2 or 1/2

解釋一下...

回答 (1)

Audrey Hepburn

2007-12-02 7:45 am

✔ 最佳答案

As follows~~~


圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn02Dec012345.jpg?t=1196523936

參考: Myself~~~

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