Is 4 (as follows):
The square root of 4 is 2 (2x2 = 4), so
2 x sqrt(4) = 2 x 2 = 4.
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because 2 times 2 = 4
the square root of 4 is 2 so you just multiply 4 times 2. the answer is 8
The square root of 4 is 2, if you multiply that by the square root of 49, which is 7, you get 14.
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