simplifying radicals

i know how to simplify radicals but.. I don't get this one.
behind of the radical (square root sign) there is a big gap before the number.
Many people are saying it's a typo, but.. i don't know.
there are a couple like that.

example problem:
square root of "space" 72

is this a different problem than the square root of 72?

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  1. I think it is a typo also. The square root of 72 is sqrt(36*2)= 6 sqrt(2)

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