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Q: What is the square root of -21?

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The square root of 21 is 4.58257569495584.

The square root of 21 is 4.58257569495584.

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

21The square root of 441 is 21

Your answer is: 17.7482393

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■

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

Yes, as is the positive square root.

21 times the square root of 5.

21

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