问题
填空题
抛物线y=x2+6x+5的顶点坐标是______．
答案
∵y=x2+6x+5
=x2+6x+9-9+5
=（x+3）2-4，
∴抛物线y=x2+6x+5的顶点坐标是（-3，-4）．
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抛物线y=x2+6x+5的顶点坐标是______．
∵y=x2+6x+5
=x2+6x+9-9+5
=（x+3）2-4，
∴抛物线y=x2+6x+5的顶点坐标是（-3，-4）．
| 完形填空。 | ||||
| A driver 1 his car by the road to have a rest. He closed his eyes and fell asleep. A man came up and knocked at his window to ask the time. The driver 2 his eyes and looked 3 his watch. "It's 8:05." he said. Then he closed his eyes again. Soon another man knocked at the window and asked, "Sir, 4 you have the time." The driver looked at the watch and told 5 man it was 8:25. He couldn't have a good rest, so he wrote some words on a piece of paper and put 6 on the window. It said,"I have no watch. "Then he closed his eyes and fell asleep again. 7 later a third man 8 along and saw the paper. He began knocking at the 9 . "Hi, sir." he said, "It's 10 now." | ||||
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