题目

因式分解：x2﹣4＝_____． 答案：【答案】【解析】利用平方差公式分解．x2﹣4＝（x＋2）（x﹣2）；故答案为：（x＋2）（x﹣2）．— You hurt your right leg? How did that happen?— Bad luck! I was walking along the road an e-bike hit me from behind.A. while B. as C. when D. before