A) 6
B) 5
C) 3
D) 2
Correct Answer: D
Solution :
\[392=2\times 2\times 7\times 7\times 2={{2}^{2}}\times {{7}^{2}}\times 2\] Clearly, when 392 is multiplied by 2, the product is a perfect square.You need to login to perform this action.
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