39852/√?=81*12

it's the simple one, just take the 81*12to the denominator and start with the smaller number to divide first.
on dividing with 12 you will get 3321 in numerator then divide with 81, you will get 41.
then square on both side and you will get the answer 1681.

assume question mark as 'x' and answer is x = 1681 or root of x = 41

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