The square root of 343 is an irrational number which is 7 times the sq rt of 7
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The cube root of 8 is 2, and the cube root of 343 is 7. Therefore, the cube root of 8 over 343 is 2 over 7.
It is -7
343 is 7 x 7 x 7. The square root is 18.520259....
A square root has to be a number multiplied by itslef. For example the square root of 16 is 4,4x4=16. 3x3=9 thats your answer.
The solution is to divide 343 by the square root of 2... That will give you the missing number.