Solve equation $x(x+1) = y(y+4)$ where $x$, $y$ are positive integers
Problem
Source: Bosnia and Herzegovina Junior Balkan Mathematical Olympiad TST 2015
Tags: number theory, equation, algebra, Diophantine equation
Source: Bosnia and Herzegovina Junior Balkan Mathematical Olympiad TST 2015
Tags: number theory, equation, algebra, Diophantine equation
Solve equation $x(x+1) = y(y+4)$ where $x$, $y$ are positive integers