If for a polynomial f(x) = x3 - px2 + qx - r, sum of its two zeroes is zero, then prove that pq = r Share with your friends Share 0 Anuradha Sharma answered this Hi, Regards 6 View Full Answer Jyotsna answered this given f(x)= x3 - px2 + qx - r to prove, pq=r proof, factorise the polynomial and then u will have the values for equating and finally we can prove pq=r -4