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± 21.633308
Expressed as a surd in its simplest form, sqrt(468) = 6 sqrt(13). Expressed as a decimal, rounded to two decimal places, this is equal to ±21.63.
468 square inches is 3.25 square feet.
There are infinitely many of them. They include square root of (4.41) square root of (4.42) square root of (4.43) square root of (4.44) square root of (4.45) square root of (5.3) square root of (5.762) square root of (6) square root of (6.1) square root of (6.2)
A principal square root is any square root that's answer is positive, and a perfect square root is a square root that's answer is an integer.