Question

（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：

Answer 1

（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