Evaluate
3\sqrt{26}\approx 15.297058541
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\sqrt{\left(-15\right)^{2}+\left(-1-2\right)^{2}}
Subtract 15 from 0 to get -15.
\sqrt{225+\left(-1-2\right)^{2}}
Calculate -15 to the power of 2 and get 225.
\sqrt{225+\left(-3\right)^{2}}
Subtract 2 from -1 to get -3.
\sqrt{225+9}
Calculate -3 to the power of 2 and get 9.
\sqrt{234}
Add 225 and 9 to get 234.
3\sqrt{26}
Factor 234=3^{2}\times 26. Rewrite the square root of the product \sqrt{3^{2}\times 26} as the product of square roots \sqrt{3^{2}}\sqrt{26}. Take the square root of 3^{2}.
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