Answer
$\sqrt{98}=7\sqrt{2}$
Work Step by Step
$\sqrt{98}=\sqrt{49\cdot 2}\qquad$ ...write $49$ as $7^{2}$.
$=\sqrt{7^{2}\cdot 2}\qquad$ ...use the Product Property of square roots:$\sqrt{ab}=\sqrt{a}\cdot\sqrt{b}$
$=\sqrt{7^{2}}\cdot\sqrt{2}\qquad$ ...simplify.
$=7\sqrt{2}$
