已知x
1,x
2是方程x
2-6x+2=0的两根,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638850054681/SYS201311030006388500546012_ST/0.png)
的值是
.
考点分析:
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