It is because of the way in which positive and negative numbers are defined.
A positive rational number.
It is the positive value of that rational number.
Because 1. Positive integers are greater than negative integers, and 2. Division by a positive number preserves the order.
Every positive rational number and its negative are the two square roots of the same positive rational number.
Negative. Only like x like = positive
Any positive number is always bigger than a negative number - whether they are rational or irrational.
Any positive rational number.
Any positive rational number.
If its positive version is rational then it is rational and if not, it is not.
Any rational positive number is still rational when you make the same number negative.
Any integer, whether it is positive or negative, is a rational number.
It is the positive number which is greater than the negative number