Question

（1）計算:

 （2）解方程：．

 

Answer 1

【答案】

（1），（2）x=3

【解析】（1)．解：原式·················· 2分

                  ························· 3分

(2)．原方程可變形為：3(x–2)–x=0···················· 1分

整理，得 2x=6，······························· 2分

解得 x=3．·································· 3分

經(jīng)檢驗，x=3是原方程的解．·························· 4分

（1）根據(jù)二次根式，零次冪求解

(2)先去分母，然后化簡求解