2013年4月新gre考试备考：gre数学考点之Roots of Polynomial
The number c is a root of a polynomial p(x), if p(c)=0. An n-th order polynomial has n complex roots. Example: 2 is a root of polynomial p(x)=x-2,since p(2)=2-2=0. 1 is a root of polynomial p(x)=x2-3x+2,since p(1)=12-3*1+2=0. Remember: A polyno...