sqrt(21) cannot be simplified.
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if you mean what is square root of 200 in its simplest radical form its 10*21/2
The square root of 21 is 4.58257569495584.
21The square root of 441 is 21
It isn't. √22 + √23 = 9.486. √21 + √24 =9.482. its not that its more than that!!! its..... NOTHING!!! you got that??? NOTHING at all!!!
441 has two square roots; 21 or -21.