Let p(x)=2x2+5x−3 and q(x)=−3x2+4x+1. Which of the following statements about the sums of their zeros is correct?
a) The sum of zeros of p(x) is greater than that of q(x).
b) The sum of zeros of p(x) is less than that of q(x).
c) The sums of zeros of p(x) and q(x) are equal.
d) The sum of zeros of p(x) is positive while that of q(x) is negative.