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}$
$=\sqrt{2\times5\times2\times2\times2\times5}$
$=(2\times2\times5)=20$
$=\sqrt{2\times5\times2\times2\times2\times5}$
$=(2\times2\times5)=20$
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