(2x^2-6x+9)^(0.5)+(2x^2-8x+16)^(0.5)=5
點拆開個開方呀@@
收錄日期: 2021-04-23 20:40:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090409000051KK01981