Question
Multiply: $\sqrt{10}$ by $\sqrt{40}$
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Answer
$\sqrt{10}$ by $\sqrt{40}$ $\sqrt{10}\times\sqrt{40}=\sqrt{10\times40}$ $=\sqrt{2\times5\times2\times2\times2\times5}$ $=(2\times2\times5)=20$
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