Evaluate
1920\sqrt{91}\approx 18315.632667205
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\sqrt{6825\left(68-4\right)^{2}\left(68-56\right)}
Multiply 68-4 and 68-4 to get \left(68-4\right)^{2}.
\sqrt{6825\times 64^{2}\left(68-56\right)}
Subtract 4 from 68 to get 64.
\sqrt{6825\times 4096\left(68-56\right)}
Calculate 64 to the power of 2 and get 4096.
\sqrt{27955200\left(68-56\right)}
Multiply 6825 and 4096 to get 27955200.
\sqrt{27955200\times 12}
Subtract 56 from 68 to get 12.
\sqrt{335462400}
Multiply 27955200 and 12 to get 335462400.
1920\sqrt{91}
Factor 335462400=1920^{2}\times 91. Rewrite the square root of the product \sqrt{1920^{2}\times 91} as the product of square roots \sqrt{1920^{2}}\sqrt{91}. Take the square root of 1920^{2}.
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