If X={1,2,3,4} and Y={1,4,9,16,20} then find all ordered pairs such that Y is square of X. Please HELP it’s urgent ASAP!

  (1, 1), (2, 4), (3, 9), (4, 16)

Step-by-step explanation:

You recognize that, of the numbers in Y, 20 is not a square. You also recognize that the remaining values of Y correspond to the squares of the values of X:

  (x, x^2) = {(1, 1), (2, 4), (3, 9), (4, 16)}