1. (x+1)(x+1)
2. (x-1)2次方
3. (x+1)(x-1)
要列式
maths1
2007-08-09 6:41 pm
回答 (2)
2007-08-09 7:30 pm
✔ 最佳答案
1.(x+1)(x+1)=x^+2*x*1+1^
=x^+2x+1
2.(x-1)2次方
=x^ - 2*x*1 +1^
=x^ -2x +1
3.(x+1)(x-1)
=x^ - 1^
=x^ -1
* = x
^ =2次方
參考: 我
2007-08-09 6:47 pm
(x+1)(x+1)=x^2+2x+1
(x-1)^2=x^2-2x+1
(x+1)(x-1)=x^2-1
(x-1)^2=x^2-2x+1
(x+1)(x-1)=x^2-1
收錄日期: 2021-04-24 10:06:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070809000051KK01140