函数y=2x^2-6x+1的图像与x轴交点之一是(-t,0)
则2t^2+6t+1=0
t^2+3t=-1/2
3t^2+9t-2013 / t^2+3t
=3*(-1/2)-2013 / (-1/2)
=40293t^2+9t-2013 / t^2+3t
=3*(-1/2)-2013 / (-1/2)
=4029

？？？应等于4024.5恩，结果是4024.5，不好意思算错了。呵呵