Yes, it is the principal square root of 4, and it is rational.
9
20
9
Say the monomial is 4a squared. To find the square root to must do each part seperately. So square root of 4 is 2 and the square root of a-squared is |a| because we do not know the sign of a. The answer is 2|a|. If there is anything that cannot be "square rooted" then it would stay under a square root sign and just multiply by 2a as well. The principal root of a number is only its positive root (you can understand that you are looking for the principal root from the sign in front of the radical, which is a positive one)
16.
+4.
The principal square root is the non-negative square root.
A principal square root is any square root that's answer is positive, and a perfect square root is a square root that's answer is an integer.
The principal square root of 9, the positive integer which is the square root of the number, is 3.
The principal (positive) square root of 225 is 15.
The principal root is the positive square root.
the square root of 16 is exactly 4 so answer is 4.00 but again it is exact and not simply nearest
the principal root is the positive square root.
The principal square root.
Yes.
The principal square root is 100.