Question 256858
{{{2sqrt(5)+3sqrt(20)}}} Substitute 20 = 4*5
{{{2sqrt(5)+3sqrt(4*5)}}} Take the square root of 4 (that's 2) and move it out from under the radical to get:
{{{2sqrt(5)+3*2sqrt(5)}}} Simplify and add the radicals.
{{{2sqrt(5)+6sqrt(5) = highlight(8sqrt(5))}}}