题目

分解因式：=_______________． 答案：a（a﹣b）． 【解析】 解：=a（a﹣b）． 故答案为a（a﹣b）． 【点睛】 本题考查因式分解-提公因式法．________ It's kind of you to help me. [　　] A．Follow me or you'll miss the way. B．This way please. It's narrow but we can save a lot of time. C．I'm busy. You can take a bus to get there.