r= x^8 - x^4 + 1 q= (2* (x^2+1)^2 + ((1-x^2)^2)*((x^5 + x^3 - x)^2)) / 8 P= 2* (x+1)^2 + ((1-x)^2)*((x^2 + x - 1)^2*x) v= x^2