Hi, roots problem again x(. The roots of the equation x2 +px + 1 = 0 are a and b. If one of the roots of the equation x2 + qx + 1 = 0 is a3, prove that the other root is b3. [Done] Without solving any equation, show that q = p(p2 - 3). Obtain the quadratic equation with roots a9 and b9, giving the coefficients of x in terms of q. Can't solve the last one, which is a9 and b9. I got x2 + (q3 -3p)x + 1. it's suppose to be x^2 + [q2(q -3)]x + 1.