Question

Evaluate:
$\sqrt{98}\times \sqrt{162}$

Answer 1

We have:

$$\begin{gathered} \sqrt{98}\times \sqrt{162} \\ =\sqrt{98\times 162} \\ =\sqrt{2\times 7\times 7\times 2\times 9\times 9} \\ =2\times 7\times 9 \\ =126 \end{gathered}$$