lgx×lg6x+lg2×lg3=0
lgx(lg2+lg3+lgx)+lg2×lg3=0
lgx×lg2+lgx×lg3+lg²x+lg2×lg3=0
lg²x+lgx×lg2+lgx×lg3+lg2×lg3=0
(lgx+lg2)(lgx+lg3)=0
lgx=-lg2,lgx=-lg3
x1=1/2,x2=1/3