maths

👨🏻‍🏫 學術台數學

[匿名]

2006-11-07 11:16 pm

i)155x^5-72z^5=?
ii)155x^5-72z^9=?

要solution!!
我唔明條式!!請清楚列明!!

更新1:

i)x^5-z^5 ii)x^5-z^9

更新2:

我想問DD數幾時教? THX~

回答 (2)

Vincent Wong

2006-11-07 11:59 pm

✔ 最佳答案

i) 155x^5-72z^5
=155x5-72z5

ii) 155x^5-72z^9

=155x5-72z9

這兩條式也不能因式分解

2006-11-07 18:10:04 補充：
樓下錯了155不能被9整除

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用戶19809

2006-11-08 1:18 am

你想factorization?
155x^5-72z^5
=9(17x^5-8z^5)
155x^5-72z^9
=9(17x^5-8z^9)
17x^5-8z^5和17x^5-8z^9均不能再factorize

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