a+b = 128
a = b·n + (n+1) n+n+1 = b 2n+1 = b a = (2n+1)·n +n+1 = 2n² + n + n +1 =
= 2n² +2n+1
2n² + 2n +1 2n+1 = 128
2n² +4n = 126 n² +2n - 63 = 0 n² - 7n + 9n - 63 = 0
n(n-7) +9(n-7 = 0 (n-7)(n+9) = 0 n-7 = 0 ⇒ n = 7 ( n = -9 ∉N
a = 2·49 + 2·7 +1 = 113 b = 15