(x二次+y二次)
更新1:
emilylou1121, william441999, pc7086 喂,係(x^2-y^2)=(x+y)(x-y)
更新2:
william441999, sorry you are right!
emilylou1121, william441999, pc7086 喂,係(x^2-y^2)=(x+y)(x-y)
william441999, sorry you are right!
收錄日期: 2021-04-21 22:02:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090925000051KK01229