sqrt(72) = sqrt(36*2) = sqrt(36)*sqrt(2) = 6*sqrt(2).
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6√2
Well, there technically is not a way to simplify the square root of 2, but the simplified version of the square root of 72 is 6 square root 2
0.0278
8.5 to 2 significant figures (72.25 is its actual square).
sqrt(72) = 6 sqrt(2)