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：

Answer 1

（1）
解：由①得　．··············································································· 2分
由②得　．··················································································· 4分
不等式组解集为．·································································· 6分
（2）解：
························································································ 2分
．·············································································· 6分

略