Question

1) Racionalize
$\frac{8}{ \sqrt{2} }$
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Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{8}{\sqrt{2}}\cdot\dfrac{\sqrt{2}}{\sqrt{2}}=\dfrac{\backslash\!\!\!\!8\sqrt{2}}{\backslash\!\!\!\!2}=4\sqrt{2}\end{array}}$