三次根号72*√3=72^(1/3)*3^(1/2)=8^(1/3)*9^(1/3)*3^(1/2)=2*3^(2/3)*3^(1/2)=2*3^(7/6)=2*3*3^(1/6)=6*3^(1/6)=6*3的六次根号
