√27-15√1/3+1/4√48

问题描述:

√27-15√1/3+1/4√48

√27-15√(1/3)+1/4*√48
=√(3^3*3)-15√(3/3^2)+1/4*√4^2*3)
=3√3-(15/3)√3+(4/4)√3
=3√3-5√3+√3
=-√3