a^2b^2+a^2+b^2=2004
=>(a^2+1)(b^2+1)=2005=5*401
=>a^2+1=5,b^2+1=401或a^+1=401,b^+1=5
=>(a,b)的组合可以是以下的任一种:
(2,20),(-2,20),(2,-20),(-2,-20)
(20,2),(-20,2),(-20,-2),(20,-2)
a^2b^2+a^2+b^2=2004
=>(a^2+1)(b^2+1)=2005=5*401
=>a^2+1=5,b^2+1=401或a^+1=401,b^+1=5
=>(a,b)的组合可以是以下的任一种:
(2,20),(-2,20),(2,-20),(-2,-20)
(20,2),(-20,2),(-20,-2),(20,-2)