这道题怎么写？

这是高中导数的题目歪。而且是刚开始学的时候的基础题目，这个最好自己看看书和习题，以及理解了导数的本质以后再来做。。我就先来弄弄吧，先求导出，y=x²-2x。然后要平行于x轴的话导数y等于0，算出x等于0和2。所以两个切点的横坐标为0和2，再算出两条直线方程，就是需要算出两个y，分别是2和2/3，所以这两条的直线方程就是y=2和y=2/3。这个本就是非常基础的题目，希望楼主能采纳

以下两篇,参考一下 1. My pen pal is an outstanding person.我的笔友是一个出色的人.
She's from China Shanghai. 她来自上海.
She is 14 years old.她今年14岁.
She speak English very well. 她英语说的很好.
She can play the Guzheng. 她会弹古筝.
She has many hobbies: watching TV, reading books, playing computer games and singing. 她有很多爱好：看电视、看书、玩电脑和唱歌.
I very like she. 我非常喜欢她. 2.My pen pal
I have a pen pal.Her name is Nancy.She comes from England.She is 13 years old.She can speak English and a little French.She is a good student.Her favorite subjects are math,history.She thinks China is a beautiful country with a long history.She can play the piano and the guitar.I think she is nice.希望有帮助,谢谢采纳

用你的朋友比作笔友，写你们怎么互帮互助。