-X^2+2, find x-intercepts

2011-12-22 6:31 am
-X^2+2, how to find x-intercepts.

please show it in step by step, thank you!!

回答 (2)

2011-12-22 6:49 am
✔ 最佳答案
y=-x²+2When this line intercept x-axis, y=0.So, 0=-x²+2 2-x²=0 (√2-x)(√2+x)=0So, √2-x=0 or √2+x=0 √2=x or x=-√2 x= -√2 or √2So, the x-intercepts are (-√2,0) & (√2,0).
參考: Hope I Can Help You ! ^_^ ( From Me )
2011-12-22 7:25 pm
我個人推薦你去搵ComingZOO
網址http://www.comingzoo.com/
或可加佢客服msn [email protected]直接查詢 我自己都去開, 希望可以幫到你~ ^T^ 比我20分!...


收錄日期: 2021-04-13 18:25:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111221000051KK00813

檢視 Wayback Machine 備份