155) If r and s are the roots of x^2 + px + q = 0, then find each of the following in terms of p and q.I) r^2 + s^2II) r - SIII) r^2s + rs^2IV) r^4 + s^4

155 If r and s are the roots of x2 px q 0 then find each of the following in terms of p and qI r2 s2II r SIII r2s rs2IV r4 s4 class=