(3x-3)(x+y)-(x-y)(3x-3)
= 咩??詳細步驟thz
更新1:
sor丫..好似吾洗步驟都得~~ 例如:: x(x+y)-2y(y+x) =(x+y)(x-2y) 吾知你地明吾明呢??
公式(急)
回答 (2)
2006-10-22 6:23 am
✔ 最佳答案
(3x-3)(x+y)-(x-y)(3x-3)=[3x(x+y)-3(x+y)]-[x(3x-3)-y(3x-3)]
=3x^2+3xy-3x-3y-(3x^2-3x)-(3xy-3y)
=3x^2+3xy-3x-3y-3x^2+3x-3xy+3y
=3x^2-3x^2+3xy-3xy+3x-3x+3y-3y
=0
2006-10-22 1:01 pm
(3x-3)(x+y)-(x-y)(3x-3)=(3X-3)(X+Y-X+Y)
=3(X-1)(2Y)
=6(X-1)Y
=3(X-1)(2Y)
=6(X-1)Y
收錄日期: 2021-04-23 14:15:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061021000051KK05785