Question 520407
{{{sqrt(75)/sqrt(5)=(sqrt(75)sqrt(5))/(sqrt(5)sqrt(5))=(sqrt(75)sqrt(5))/(sqrt(5)^2)=(sqrt(15*5)sqrt(5))/5=sqrt(15*5*5)/5=sqrt(15*25)/5=5*sqrt(15)/5=cross(5)*sqrt(15)/cross(5)=sqrt(15)}}}