Question

If y is the principal square root of 5, what must be true?

A. y2 = 5, and y is negative
B. y = 52, and y is positive
C. y = 52, and y is negative
D. y2 = 5, and y is positive

Answer 1

Short answer

Explanation:

It's D y²=5, and y is positive

Answer 2

the principal square root is the positive root
(y2 means y^2, right? so if so then continue)
that means that y^2=5 and y is positive
square root means find x times x =the original number and x is the square root
you can have an example 4
square root of 4 is 2 or -2 because 2 times 2=4 and -2 times -2=4
the principal one is the positive one


the answer is D y^2=5, and y is positive