Find the square root of 784 by prime factorisation method?

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answer is B.

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Detailed Solution

Concept- Decompose the number 784 into its prime factors. Group the factors that appear twice in the form of a square quantity. Then apply the square roots to these groups to get these prime factors and multiply them to find the square root of the number 784.
Given 784
The factorize value of 784 is

Let us apply square root on both side
Question Image

Hence, the correct answer is option 2) .

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