- #1

- 1,170

- 3

## Homework Statement

Is it possible to create an injection from {a^2+b^2 l a,b[itex]\in[/itex]Q} to {{a+b l a,b[itex]\in[/itex]Q}

## Homework Equations

I am not sure about this. The problem is that many combinations of a,b can yield the same number, so how do I tackle this obstacle?