Question
Multiply and write the answer in the simplest form : $\quad 5 \sqrt{8} \times 2 \sqrt{8}$
✓
Answer
$\begin{aligned} 5 \sqrt{8} \times 2 \sqrt{8} & =5 \times 2 \times \sqrt{8} \times \sqrt{8} \\ & =5 \times 2 \times 8 \\ \therefore \quad 5 \sqrt{8} \times 2 \sqrt{8} & =80\end{aligned}$
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