Answer:
9 , 16x^2 , 4z and 100y^2 are perfect Squares!
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What are Perfect Squares?
A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer.
3 * 3 = 9
4 * 4 = 16
2 * 2 = 4
50 * 50 = 100
Therefore making those numbers perfect squares.
[NOTE: The numbers that are squared are still perfect squared, just a larger version!]
More information on perfect squares:
https://brainly.com/question/17735980?referrer=searchResults
Have a WONDERFUL day! (:
