-12x^2+15+11x
= -(12x^2-15-11x)
= -(3x-5)(4x+3)
Do I need to put back the negative sign into the bracket in the answer?Why?
收錄日期: 2021-04-13 16:03:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080912000051KK01272