9514 1404 393
Answer:
 as written: (12√6)a²
Explanation:
The way you have written this, only the numbers are under the radicals:
 

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We suspect you may want to simplify ...
 

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We make use of the rules for combining radicals and exponents.
 (√a)(√b) = √(ab)
 (a^b)(a^c) = a^(b+c)
 √(a²) = a . . . . for a ≥ 0