Evaluate
40\sqrt{521}\approx 913.016976841
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\sqrt{1542564-842^{2}}
Calculate 1242 to the power of 2 and get 1542564.
\sqrt{1542564-708964}
Calculate 842 to the power of 2 and get 708964.
\sqrt{833600}
Subtract 708964 from 1542564 to get 833600.
40\sqrt{521}
Factor 833600=40^{2}\times 521. Rewrite the square root of the product \sqrt{40^{2}\times 521} as the product of square roots \sqrt{40^{2}}\sqrt{521}. Take the square root of 40^{2}.
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