So, if f is like this if f is an x n plus a n minus 1 x n minus 1 and so on, what is minus of f, that is clearly just minus a n x n minus x n minus a n minus 1 x n minus 1 and so on minus a 1 x minus a 0.
f ഇതുപോലെയാണെങ്കിൽ, f = anxn + an-1xn-1+...+a1x + a0.