Two numbers are named as Number A and Number B. The sum of Number A, its square and its cube is 399. The sum of Number B, its square and its cube is 819. What would be the square of the number obtained by adding Number A and Number B?
+591 I'm sorry, there's not much explanation, other than trial and error, for odd numbers, that are less than 10. I got 7 for A and 9 for B so (7+9)^2=$\boxed{256}$
