Show that the cost of a claim with payoff Sn (Sn-K) is

Show that the cost of a claim with payoff S_N(S_N - K) is V_0 = S^2_0(v/1+i)^N-KS_0, where v=(u+d)(1+i)-ud. Show that the cost of a claim with payoff S_N(S_N - K) is V_0 = S^2_0(v/1+i)^N-KS_0, where v=(u+d)(1+i)-ud