$$H(s)=\frac{Z(s)}{P(s)}=K\frac{(s-Z_{1.})(s-Z_{2.})\cdots (s-Z_M)}{(s-P_{1.})(s-P_{2.})\cdots (s-P_N)}$$

$$\frac{B(s)}{\mathrm{A.}(s)}=\frac{B_{1.}{s}^{(N-1.)}+\cdots +B_{(N-1.)}s+B_N}{{\mathrm{A.}}_{1.}{s}^{(M-1.)}+\cdots +{\mathrm{A.}}_{(M-1.)}s+{\mathrm{A.}}_M}.$$