Evaluate
2\sqrt{65}\approx 16.124515497
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\sqrt{196+8^{2}}
Calculate 14 to the power of 2 and get 196.
\sqrt{196+64}
Calculate 8 to the power of 2 and get 64.
\sqrt{260}
Add 196 and 64 to get 260.
2\sqrt{65}
Factor 260=2^{2}\times 65. Rewrite the square root of the product \sqrt{2^{2}\times 65} as the product of square roots \sqrt{2^{2}}\sqrt{65}. Take the square root of 2^{2}.
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