Which of the following polynomial defines constant polynomials?
Find the zero of the polynomial in each of the following cases: (i) p(x)=x+5 (ii) p(x)=x−5 (iii) p(x)=2x+5 (iv) p(x)=3x−2 (v) p(x)=3x (vi) p(x)=ax,a≠0 (vii) p(x)=cx+d,c≠0 and c,d are real numbers.