just about 7.54983443527075
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The square root of 57 is between 7 and 8
7.6
The square of 57 is 3249 The square root of 57 is closer to 8.
2x(square root of 57) If we approximate this, it is about 15.1 but the first answer is exact and in simplest form.
Neither. It is an imaginary number.