将x=1带入px²+qx+1得：p+q=2012
当x=-1时,-px²+qx+1
=-p-q+1
=-（p+q）+1
=-2012+1
=-2011当x=1时代数式px的平方+qx+1的值为2013对呀p+q+1=2013p+q=2012不客气