回答: #= 33 / 37-61 / 37i# 説明: #(7-9i)/(6 + i)| *(6-i)# #((7-9i)(6-i))/((6 + i)(6-i))# #(42-61i + 9i ^ 2)/(36-6i + 6i-2)# #(42-61i + 9i ^ 2)/(36-i ^ 2)# #(42-9-61i)/(36 + 1)# #(33-61i)/(37)# #= 33 / 37-61 / 37i#