No. Look at the prime factors of 65: there are no repeated prime factors, therefore this number contains no perfect square.
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The square root of 65 cannot be simplified.
The square root of 20 simplified is ±4.5
The square root of 96 simplified is: 9.8
The square root of 828 simplified is 28.8
The square root of 58 simplified is 7.6 (7.61577311).