Polynomials help~~ Heh, so I posted this thread in the wrong category so I'm reposting it! =) Hello. So here was this problem I came across: If x^4-x^3+x^2-x^1+x^0=0, what is the numerical value of x^40-x^30+x^20-x^10+x^0? I did try doing many stuffs (symmetry) & factoring, but I think none of these steps helped. Enlighten the youngster, gracias.