唔該幫下我. thz very much ,
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2題f1 maths. 唔該你!
2009-08-31 7:20 am
回答 (1)
2009-08-31 7:34 am
✔ 最佳答案
(-4x2y)2(2xy)3= (16x4y2)(8x3y3)
= 128x4+3y2+3
= 128x7y5
[(ab2)4x(-a)2] / (-a2b)3
= (a4b8)x(a2) / (-a6b3)
= -a4+2-6b8-3
= -a0b5
= -b5
收錄日期: 2021-04-24 10:12:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090830000051KK02416