(7+5y)(4-6y+8y^2)
約簡
數學方程式
2007-01-19 3:52 am
回答 (1)
2007-01-19 4:15 am
✔ 最佳答案
(7+5y)(4-6y+8y^2)=7(4-6y+8y^2)+5y(4-6y+8y^2)
=28-42y+56y^2+20y-30y^2+40y^3
=28-22y+26y^2+40y^3
收錄日期: 2021-04-12 17:54:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070118000051KK03634