Question

simplify.
$3\sqrt{18} + \sqrt{98}$

Explanation:

Step1: Simplify each radical

$3\sqrt{18} = 3\sqrt{9\times2} = 3\times3\sqrt{2} = 9\sqrt{2}$
$\sqrt{98} = \sqrt{49\times2} = 7\sqrt{2}$

Step2: Add like radicals

$9\sqrt{2} + 7\sqrt{2} = (9+7)\sqrt{2}$

Answer:

$16\sqrt{2}$