Evaluate
15\sqrt{2}\approx 21.213203436
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\sqrt{225+15^{2}}
Calculate 15 to the power of 2 and get 225.
\sqrt{225+225}
Calculate 15 to the power of 2 and get 225.
\sqrt{450}
Add 225 and 225 to get 450.
15\sqrt{2}
Factor 450=15^{2}\times 2. Rewrite the square root of the product \sqrt{15^{2}\times 2} as the product of square roots \sqrt{15^{2}}\sqrt{2}. Take the square root of 15^{2}.
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