更新1:
sorry!should be2.show that x^2+x+2x(x=2)^1/2=(x+(x+2)^(1/2))^2-2
f5數學顯?
回答 (2)
2011-01-07 6:20 am
✔ 最佳答案
x^2+x+2x(x+2)^1/2=x^2+2x(x+2)^1/2+(x+2)-2
=[x+(x+2)^(1/2)]^2-2
2011-01-06 22:20:59 補充：
題目應該打錯左!!!!!!!!!!!
2011-01-07 6:17 am
題目有無打錯??????
收錄日期: 2021-04-19 23:48:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110106000051KK01346