Evaluate
2\sqrt{17}\approx 8.246211251
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\sqrt{64+2^{2}}
Calculate 8 to the power of 2 and get 64.
\sqrt{64+4}
Calculate 2 to the power of 2 and get 4.
\sqrt{68}
Add 64 and 4 to get 68.
2\sqrt{17}
Factor 68=2^{2}\times 17. Rewrite the square root of the product \sqrt{2^{2}\times 17} as the product of square roots \sqrt{2^{2}}\sqrt{17}. Take the square root of 2^{2}.
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