c106-6和c106-9什么意思

设t=a^ 则原方程化为t-t^ = - t^ 移位后得： = t^ -t^ +t- = t^ (t- )+t(t- )+ (t- )=(t- )( t^ +t+ )=(t- )[( (t+ / )^ + / ]得t= （因( (t+ / )^ + / > )即a^ = 得a=