f.4,,amathz..
2008-09-25 6:54 am
Let a and b be the roots of the equation 2x^2 + 4x + k =0, where k is a constant. If a-b=3, find the value of k.
回答 (1)
2008-09-25 7:25 am
✔ 最佳答案
Explanation as follows:圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths490.jpg?t=1222269891
參考: My Maths Knowledge
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https://hk.answers.yahoo.com/question/index?qid=20080924000051KK03297