Решите задачу:
(9+√2)^2=81+18√2+2=83+18√2 (1-4√3)^2=1-8√3+48=49-8√3 (2√10-3√2)^2=40-12√20+18=58-12√20 (4√5-2√3)^2=80-16√15+12=92-16√15