Evaluate
20\sqrt{17}\left(\sqrt{10}-1\right)\approx 178.305983696
Factor
20 \sqrt{17} {(\sqrt{10} - 1)} = 178.305983696
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20\sqrt{17}\sqrt{10}-20\sqrt{17}
Use the distributive property to multiply \sqrt{17} by 20\sqrt{10}-20.
20\sqrt{170}-20\sqrt{17}
To multiply \sqrt{17} and \sqrt{10}, multiply the numbers under the square root.
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