82 is a not perfect square.
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51 is not a perfect square. 72 = 49 82 = 64 51 is between 49 and 64 so its square root is 7+a bit, and it is not a perfect square.
Yes. The square root of any whole number that is not a perfect square is irrational.
64. 64 = 82 = 43 26 = (23)2 = (22)3 = 64.
64 = 82 and 43 1 = 1^2 and 1^3 0=0^2 and 0^3
No, 74 is not a perfect square of an integer - its square root, rounded to two decimal places, is equal to 8.60. The closest square numbers to 74 are 81 (92) and 64 (82).