Answer:
[tex]7\sqrt{2}[/tex]
Step-by-step explanation:
We start by factoring 98 and look for a perfect square:
98=7*7*2 = [tex]7^{2} *2[/tex]
This allow us to simplify the radical:
[tex]\sqrt{98} = \sqrt{7^{2}*2 }[/tex]
Finally we have:
[tex]\sqrt{7^{2}*2 } =7\sqrt{2}[/tex]
