有沒有好心人能幫我算算第5題😢 老師說了我還是聽不懂... 拜託數學好的人幫我看看了🙏🙏🙏?

2019-08-21 2:43 pm

回答 (1)

2019-08-21 6:24 pm
Sol
(x^2+3x+2)^2
=(x^2+2x+3+x-1)^2
=(x^2+2x+3)^2+2(x-1)(x^2+2x+3)+(x-1)^2
=(x^2+2x+3)^2+2(x-1)(x^2+2x+3)+x^2-2x+1
=(x^2+2x+3)^2+2(x-1)(x^2+2x+3)+x^2+2x+3-4x-2
Ans:-4x-2


收錄日期: 2021-04-30 22:49:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190821064350AAyuLn1

檢視 Wayback Machine 備份