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Q: Negative square root of 81

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-9

The square roots of -81 are ±9i where i is the imaginary square root of -1.

Since it is the square root of a negative number, it is actually imaginary, neither rational nor irrational. It is equal to 9i, or 9 times whatever the square root of negative one is.square root of -81 = square root of 81 times i = 9i

No. The square root of 81/(-3) is rational. The square root of [81/(-3)] is imaginary (a kind of complex number).

Square root of 9: 3Square root of -81: 9i The product of both is 27i

There is no square root for a negative number. It is an imaginary number.

-1/9

It is -10/9

81 because there are no negative square roots

81 is the square root and 9.5 is under root.

The square root of 81 is 9 and the square root of 4 is 2!

The square root of 6561 is 81

The square root of 81 is 9

x2=-81take the square root of both sidessince 81 is negative you need to take 81 times i when i=-1 then solve as the square root of 81. your answer is x=9i

Yes. -9 (that is, negative 9)

Yes. Square root of 81= 9

9 is the square root of 81 as 9*9=81

The square root of 81 is ±9 which is in its simplest form.

The opposite of a square root is the square of a number. For example, the principal square root of 81 is 9, while the square of 9 is 81.

Square roots can be positive or negative. 9 x 9 = 81 -9 x -9 = 81 9 is the positive square root of 81.

Square root of 81

the square root of 64 is 8 because 8x8 is 64 the square root of 81 is 9 because 9x9 is 81

The square root of 81 squared is 81.

Square root of 81 is 9.

The square root of 6561 is 81.