In GRE Mini Exam 1, Question No.5 of quants, I think the answer should be two because there is one more solution to the equation that we didn’t consider and that is (0,-4)

Please correct me if I am wrong

The number zero is **neither positive nor negative**. In GRE, if they say **“non-negative”**, you can consider 0, but if they say **“positive”**, you shouldn’t consider 0.