Question

（本题共两小题，每小题6分，满分12分）

（1）解不等式组：                  

（2）因式分【解析】

Answer

（1）

【解析】
由①得 ．··············································································· 2分

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

不等式组解集为．·································································· 6分

（2）【解析】

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

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

【解析】略