圖片參考:http://imgcld.yimg.com/8/n/HA07128091/o/701104090094013873423780.jpg
Please show steps clearly.
更新1:
(2x+1)(2x-3)=4x^2-4x-3, not=4x^2-4x+3
(2x+1)(2x-3)=4x^2-4x-3, not=4x^2-4x+3
收錄日期: 2021-04-23 20:46:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110409000051KK00940