質問: 3 and b= 5? ==================================================================
回答: #=-7# #### Explanation: #(a^2-2(b^2-a))/(2+a)# for #a=3# and #b=5# #=(3^2-2(5^2-3))/(2+3)# #=(9-2(25-3))/5# #=(9-2(22))/5# #=(9-44)/5# #=-35/5# #=-7#