The radical form of the expression given in the task content is; 5√3.
It follows from the task content that the radical form of the number 8.66 is required.
On this note, the square of the number, 8.66 is; 75.
Therefore, 8.66 = √75 = √25×3 = 5√3.
The required radical form is therefore; 5√3.
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