square root of 85 is 9.2195444 but the in the simplest radical is square root of 5 times square root of 17.
http://wiki.answers.com/Q/What_is_the_Square_root_...

It doesn't simplify any more... you could break it into 2 diff square roots, in which case it'd be:
http://answers.yahoo.com/question/index?qid=200812...

The square root of one is one. A square root is a divisor of a quantity that when squared gives the quantity. The square root of 25 is 5 and 5.
http://answers.ask.com/Reference/Dictionaries/what...
