A. B is a rational number, so what is the minimum value of the square-3 of (a, b)? When taking the minimum value, what is the relationship between a and B

A. B is a rational number, so what is the minimum value of the square-3 of (a, b)? When taking the minimum value, what is the relationship between a and B

The minimum is - 3
When the minimum value is taken,
A+B=0
So they are opposite numbers