Evaluate
42\sqrt{19}\approx 183.073755629
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21\times 2\sqrt{19}
Factor 76=2^{2}\times 19. Rewrite the square root of the product \sqrt{2^{2}\times 19} as the product of square roots \sqrt{2^{2}}\sqrt{19}. Take the square root of 2^{2}.
42\sqrt{19}
Multiply 21 and 2 to get 42.
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