快入亞！唔識計因式分解亞
回答 (3)
2008-09-06 10:31 pm
✔ 最佳答案
m^2 -9m^2 -9
-------------------------
-9m^2 - 9m^2= -18m^2
m^4－18m^2+81
=(m^2 -9)(m^2 -9)
2008-09-06 10:35 pm
m^4-18m^2+81
=(m^2-9)^2
=[(m-3)(m+3)]^2
=(m^2-9)^2
=[(m-3)(m+3)]^2
2008-09-06 10:18 pm
m4-18m+81
=(m-9)
=[(m-3)(m+3)]
2008-09-06 14:49:21 補充：
m4-18m+81
=(m^2 -9)^2
=[(m-3)(m+3)]^2
=(m-9)
=[(m-3)(m+3)]
2008-09-06 14:49:21 補充：
m4-18m+81
=(m^2 -9)^2
=[(m-3)(m+3)]^2
收錄日期: 2021-04-23 20:36:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080906000051KK01222