This q is the last one in exercise 4.3 from cambridge, if someone could help me with it i would be very grateful.......
18. The equation x^3+qx+r=o has roots a,b and c. Find expressions for
a) a^2 + b^2 + c^2
b) a^3 + b^3 + c^3
c) a^5 + b^5 + c^5
The only one I'm stuck on is c). It...