(1)计算: (2)解方程:
(1)计算:(2)解方程:....
(1)计算: (2)解方程: .
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(1) ,(2) x =3 |
(1).解:原式 ·················· 2分 ························· 3分 (2).原方程可变形为:3( x –2)– x ="0····················" 1分 整理,得 2 x =6,······························· 2分 解得 x =3.·································· 3分 经检验, x =3是原方程的解.·························· 4分 (1)根据二次根式,零次幂求解 (2)先去分母,然后化简求解 |
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