(r-3s)(r^2+4s^2-3)
(ab+2b)(3a-1)
(4x^2+5cx-10)(cx+2)
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Maths questions
2006-11-14 1:59 am
回答 (1)
2006-11-14 2:19 am
✔ 最佳答案
1) (r-3s)(r^2+4s^2-3)=r^3+4rs^2-3r-3sr^2-12s^3+9s
2) (ab+2b)(3a-1)
=3ba^2-ab+6ab-2b
=3ba^2+5ab-2b
3) (4x^2+5cx-10)(cx+2)
=4cx^3+8x^2+5c^2*x^2+10cx-10cx+20
=4cx^3+8x^2+5c^2*x^2+20
參考: me
收錄日期: 2021-04-23 15:55:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061113000051KK02695