(本題共兩小題,每小題6分,滿分12分)

(1)解不等式組:                  

 

(2)因式分解:

 

【答案】

(1)

解:由①得 .··············································································· 2分

由②得 .··················································································· 4分

不等式組解集為.·································································· 6分

(2)解:

························································································ 2分

.·············································································· 6分

【解析】略

 

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