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Q: Square root of 21

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21The square root of 441 is 21

441 has two square roots; 21 or -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!!!

Expressed as a surd, the square root of 84 is equal to 2 sqrt (21). √84 = √(4 x 21) = √4√21 = 2√21

2.3333

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The square root of -21 is: 4.582576 i

The square root of 21 is 4.58257569495584.

4.6 is a better approximation to the square root of 21.

Your answer is: 17.7482393

21The square root of 441 is 21

21

Root 64 is 8, if by root you mean the square root. Then the problem become -square root 84(6+8) which is the - square root of 84(14) But square root of 84 is 2(square root of 21) so the final answer comes from -2(square root 21)x14 which is -28square root (21)

(√(a))²=a The square root and the square cancel to leave just 49/21■

Yes, as is the positive square root.

21 times the square root of 5.

The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = Â±21

It is 21

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