絕對值amaths題目一條...好急!!
回答 (1)
2007-10-25 6:38 am
✔ 最佳答案
let |x+3| = yy^2 + 2y - 15 = 0
(y-3)(y+5) = 0
y = 3 or y = -5
|x+3| = 3 or |x+3| = -5 (rejected)
x = 0 or x = -6
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071024000051KK04144