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已知x1,x2分别是一元二次方程2x2-6x-3=0的两个实数根,则代数式的值为...
已知x
1,x
2分别是一元二次方程2x
2-6x-3=0的两个实数根,则代数式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164750059353508/SYS201310221647500593535013_ST/0.png)
的值为
.
考点分析:
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