a. 25x2次-10x+1
b. hence~
25x2次-10x+1-25y2次
MATHS!
2007-01-15 8:22 am
回答 (2)
2007-01-15 8:31 am
✔ 最佳答案
(a) 25x^2-10x+1=(5x)^2-2(5x)(1)+1=(5x-1)^2
(b) Using (a), we know that
25x^2-10x+1-25y^2=(5x-1)^2-25y^2
=(5x-1)^2-(5y)^2
=(5x-1+5y)(5x-1-5y)
參考: myself
2007-01-15 9:39 pm
a.100-10x+1
=100+1-10x
b.25x4-10x+1-25yx4
=100-10x+1-4x25y
=100+1-4-10x X25y
=95-10x X25y
=100+1-10x
b.25x4-10x+1-25yx4
=100-10x+1-4x25y
=100+1-4-10x X25y
=95-10x X25y
收錄日期: 2021-05-01 16:20:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070115000051KK00089