Question 792450
{{{5sqrt(6)(sqrt(3)-2sqrt(6))= 5sqrt(6)*sqrt(3)-5sqrt(6)*2sqrt(6)= 5sqrt(6)*sqrt(3)-5*2*sqrt(6)*sqrt(6)= 5sqrt(6)*sqrt(3)-10*6=
5sqrt(6)*sqrt(3)-60= 5sqrt(2*3)*sqrt(3)-60= 5*sqrt(2)*sqrt(3)*sqrt(3)-60=5*sqrt(2)*3-60=5*3*sqrt(2)-60=15sqrt(2)-60}}}