如果关于x的一元二次方程x2+px+q=0的两根分别为x1=2，x2=1，那么q

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问题填空题

如果关于x的一元二次方程x²+px+q=0的两根分别为x₁=2，x₂=1，那么q的值是____．

答案

根据根与系数的关系列出关于q的一元一次方程，求出q的值即可．

解：由一元二次方程根与系数的关系可得，x₁?x₂=q，即q=2．

故答案为：2．

考查的是一元二次方程根与系数的关系，即x₁?x₂=．

单项选择题 A3/A4型题

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D.百会、风池

E.中脘、内关

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完形填空

完形填空。
As she waited at the edge of the ice for her music to start, Peggy took a quick look at her father standing nearby with a group of parents and teachers. He smiled at her. Then she __1 _out at the audience, __2_to see her mother. These two, Alvert and Doris Fleming, had _3_ all the way from California more than 2,000 miles away, to see their _4_ compete in this sports meet in Cleveland, Ohio. The music _ 5_ and Peggy moved onto the ice, letting the music _6_ her along into her turns, and she began skating with much _7_ in herself. The cold fear she always had in the _8_ seconds before skating onto the ice was _9 . She was feeling the movement of the _10_and letting it carry her. She skated easily, 11_ did some jumps, a final turn and her performance was _12 . The crowd loved it and cheered _13_ she skated off the ice. "Nice job," said one of the other _14_. It was the remark that _15_ came after a free-skating performance. But what would the _16_ say ? Standing beside her father, Peggy _17_ for the scoring to be finished. On all sides were other young skaters, some waiting _18_alone, others with a parent. Shortly before 10 o'clock the results were _19 . The newUni-ted States Women's Skating Champion was Peggy forming of Padena, _20 !
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