Question 331070
<br>{{{3*sqrt(80)+4*sqrt(180)}}} given <br>

{{{3*sqrt(16*5)+4*sqrt(36*5)}}} factor the numbers under the radical<br>

{{{3*4*sqrt(5)+4*6*sqrt(5)}}} pull out the squares<br>

{{{12*sqrt(5)+24*sqrt(5)}}} simplify<br>

{{{36*sqrt(5)}}} add like terms and final answer<br>

I hope this helps!<br>