1.ax+ay+2by+2bx
2.25+60b+36b^2
3.-343x^3+64y^3
4.b^2-6b+8
收錄日期: 2021-04-13 14:18:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071031000051KK02548