Question

determinati ab, pentru care ab+ba =pp (patrat perfect) ab si ba e cu bara deasupra​

Answer 1

ab+ba=

=10a+b+10b+a

=11a+11b

=11(a+b)

11(a+b) e patrat perfect => a+b=11

ab={29, 38, 47, 56, 65, 74, 83, 92}