As 0 is neither positive or negative. The least possible value we can assume would be Z = 1.

and let’s substitute the same.

As for example

A = 2 & B = 3

Z= PA + QB

**1-PA= QB**

and for any given inputs of A & B, we can always find a Q & P as integers for the derived equation. So for any input, the minimum value will always be 1.

Or did I miss anything ?