Not to flog a dead horse here, but for Q2 you could show that P(x)=x^5-1 can be factrorised to P(x)=(x-1).Q(x)=(x-1)(x^4+x^3+x^2+x+1) through long division, and it can be observed that P(x)=0 has only opne real root, x=1, which is clearly shown as the root given by the factor (x-1). It is also...