Respuesta:
1998
Explicación paso a paso:
(a + b + c)² = 324
=> a + b + c = 18
bca = 100b + 10c + a
cab = 100c + 10a + b
abc = 100a + 10b + c
=> bca + cab + abc = a(1 + 10 + 100) + b(100 + 1 + 10) + c(10 + 100 + 1)
= 111a + 111b + 111c
= 111(a + b + c)
= 111 x 18
= 1998
