if there is no integer answer, they are irrational
ex. sq root 5 is irrational but sq root 9 = 3 so it is rational,integer, counting number
if you are taking sq root of a negative they are imaginary ex. sqroot (-9)
=========================
The square roots of all positive real numbers are real numbers.
The square roots of all negative real numbers are imaginary numbers.
Some square roots are rational, but the vast majority are irrational.
Only a set can have subsets, a number such as -2.38 cannot have subsets.
Real number, Rational Number
{natural, whole, integers, rational, real}
Integers, Rational numbers, Real numbers and Complex numbers.
The two main DISJOINT subsets of the Real numbers are the rational numbers and the irrational numbers.
The set of real numbers is infinitely large, therefore it has an infinite amount of subsets. For example, {1}, {.2, 4, 800}, and {-32323, 3.14159, 32/3, 6,000,000} are all subsets of the real numbers. There are a few, important, and well studied namedsubsets of the real numbers. These include, but aren't limited to, the set of all prime numbers, square numbers, positive numbers, negative numbers, natural numbers, even numbers, odd numbers, integers, rational numbers, and irrational numbers. For more information on these, and other, specific subsets of the real numbers, follow the link below.
There are infinitely many subsets of real numbers. For example, {2, sqrt(27), -9.37} is one subset.
Both are subsets of the real numbers.
Real number set, imaginary number set, and their subsets.
10
Rational Numbers and Irrational Numbers
Rational numbers.