The square root of 216 is ~14.7
72
446
6The cube root of 216 is 6, if that is what you are asking. I'm assuming that 'qube' is a typo
6
The square root of 216 is ~14.7
The square root of 216 is 14.6969384567. This cubed is 3174.53870665.
72
446
6 times the square root of 6
36
46
sqrt(216) = 14.6969 (to 4 dp).
The square root of 36 is 6. 6 cubed is 216.
6
If, by "third square root" you mean cube root, the answer is 7.
(x - 6 times the square root of 6)(x + 6 times the square root of 6)