2x^4 * 2x^4 =
3x^4 * 6x^4 =
3x^5 * 3x^6 =
thx
收錄日期: 2021-04-16 17:04:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140915000051KK00143