(1)先化简,再求值:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/201310201202593290959495/SYS201310201202593290959019_ST/0.png)
•(x+3),其中x=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/201310201202593290959495/SYS201310201202593290959019_ST/1.png)
;
(2)解方程:x
2+4x-1=0.
考点分析:
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-(π-1)
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)
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