Question 318073
Well, you can't just add the term as they are, you must first simplify them before you can add them.
{{{4*sqrt(32)+5*sqrt(72) = 4*sqrt(16*2)+5*sqrt(36*2)}}}={{{4*sqrt(16)*sqrt(2)+5*sqrt(36)*sqrt(2)}}}={{{4*4*sqrt(2)+5*6*sqrt(2) = 16*sqrt(2)+30*sqrt(2)}}}={{{46*sqrt(2)}}}