The square root of 81 is 9. 9 x 9 = 81.
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The square root of 81 squared is 81.
The cubed root of 726 is 9. 9 squared is 81
~18.721
The square root of 81 is 9. This is because 9*9 is 81. This also means that 81 is 9 squared or 92.
With square roots if you have a number times itself or squared then that that product is that numbers square root example: 9x9= 81 81 square root is 9