Evaluate
2\sqrt{145}\approx 24.083189158
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\sqrt{256+18^{2}}
Calculate 16 to the power of 2 and get 256.
\sqrt{256+324}
Calculate 18 to the power of 2 and get 324.
\sqrt{580}
Add 256 and 324 to get 580.
2\sqrt{145}
Factor 580=2^{2}\times 145. Rewrite the square root of the product \sqrt{2^{2}\times 145} as the product of square roots \sqrt{2^{2}}\sqrt{145}. Take the square root of 2^{2}.
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