1) 169y^2+26y+1
2) 36t^2-12t+1
要有step..thx
F.2數學
2007-12-21 10:27 pm
回答 (2)
2007-12-21 10:48 pm
✔ 最佳答案
1. 169y^2+26y+1=(13y)^2+2(13y)+1^2
=(13y+1)^2
備註:(a+b)^2=a^2+2ab+b^2
2. 36t^2-12t+1
=(6t)^2-2(6t)+1^2
=(6t-1)^2
備註:(a-b)^2=a^2-2ab+b^2
2007-12-21 11:04 pm
1)169y^2+26y+1
=(13y)^2+2(13y)(1)+1^2
=(13y+1)^2
2)36t^2-12t+1
=(6t)^2-2(6t)(1)+1^2
=(6t-1)^2
=(13y)^2+2(13y)(1)+1^2
=(13y+1)^2
2)36t^2-12t+1
=(6t)^2-2(6t)(1)+1^2
=(6t-1)^2
收錄日期: 2021-04-19 00:08:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071221000051KK01488