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1 September, 16:56

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

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Answers (1)
  1. 1 September, 18:43
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    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
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