Question 375794
{{{5*sqrt(20)-8*sqrt(5)=5*sqrt(4*5)-8*sqrt(5)}}}
{{{5*sqrt(20)-8*sqrt(5)=5*2*sqrt(5)-8*sqrt(5)}}}
{{{5*sqrt(20)-8*sqrt(5)=10*sqrt(5)-8*sqrt(5)}}}
{{{highlight(5*sqrt(20)-8*sqrt(5)=2*sqrt(5))}}}