题目

答案:【答案】x1=1+,x2=1-【解析】利用配方法将方程变形为(x-1)2=2,再用直接开平方法即可求解.x2-2x-1=0,x2-2x=1,x2-2x+1=1+1,即(x-1)2=2,∴x-1=±,∴x1=1+,x2=1-.完成句子。1. 吴先生正在上海度假。     Mr. Wu is in Shanghai ______.2. 沿着人民路走,在第二个拐弯处向右走。     Go down People's Road and take the ______ on the right.3. 足球在房间的角落里。    The football is in the ______ the room.4. 你能告诉我去动物园的路吗?     Can you tell me the ______the zoo?5. 银行离这里不远,沿着马路走5分钟就到了。     The bank isn't  ______ here. It's five minutes' walk up the road.
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