MathDB

5

Part of 1990 ITAMO

Problems(1)

x^2 +5x+16 not divisible by 169

Source: 1990 ITAMO p5

1/31/2020
Prove that, for any integer xx, x2+5x+16x^2 +5x+16 is not divisible by 169169.
number theorydivisibletrinomial