\frac{ 7 \sqrt{ 558 } }{ }
Evaluate
21\sqrt{62}\approx 165.354165354
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\frac{7\times 3\sqrt{62}}{1}
Factor 558=3^{2}\times 62. Rewrite the square root of the product \sqrt{3^{2}\times 62} as the product of square roots \sqrt{3^{2}}\sqrt{62}. Take the square root of 3^{2}.
\frac{21\sqrt{62}}{1}
Multiply 7 and 3 to get 21.
21\sqrt{62}
Anything divided by one gives itself.
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