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0.6049
well, the square root of 81 is 9, and seven squared is 49, so it wud be 40
1.6531
No. The square root of 81/(-3) is rational. The square root of [81/(-3)] is imaginary (a kind of complex number).
Examples of such numbers are 49, where sqrt(49) = 7, 81, where sqrt(81) = 9. Such numbers are called square numbers.
81 is the square root and 9.5 is under root.
sqrt(25/81) = 5/9
The square root of -81 = 9 i9i
The square root of -81 = 9 i9i
The square root of 81 is 9
The square root of 6561 is 81
The square root of 81 is 9 and the square root of 4 is 2!