1.(x^2+4x+4)-9y^2
2.25x^2-(9y^2-6y+1)
3.(x^2+6xy+9y^2)-16z^2
4.4x^2-(4y^2-4yz+z^2)
thanks:):)
4條f.2數學(續多項式的因式分解)(7點!!)
2011-08-26 1:31 am
回答 (1)
2011-08-26 1:51 am
✔ 最佳答案
1.(x^2+4x+4)－9y^2=(x+2)^2－(3y)^2
=(x－3y+2)(x+3y+2)
2.25x^2－(9y^2－6y+1)
=(5x)^2-(3y－1)^2
=(5x－3y+1)(5x+3y－1)
3.(x^2+6xy+9y^2)－16z^2
=(x+3y)^2－(4x)^2
=(x+3y－4x)(x+3y+4x)
=3(y－x)(5x+3y)
4.4x^2－(4y^2－4yz+z^2)
=(2x)^2－(2y－z)^2
=(2x－2y+z)(2x+2y－z)
收錄日期: 2021-04-30 15:59:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110825000051KK00906