(2)原式=lg5*(3lg2+3)+(√3*lg2)^2-lg6+lg6-2
=3lg5*lg2+3lg5+3lg2*lg2-2
=3(lg5+lg2)lg2+3lg5-2
=3lg10*lg2+3lg5-2
=3lg2+3lg5-2
=3-2
=1
(2)原式=lg5*(3lg2+3)+(√3*lg2)^2-lg6+lg6-2
=3lg5*lg2+3lg5+3lg2*lg2-2
=3(lg5+lg2)lg2+3lg5-2
=3lg10*lg2+3lg5-2
=3lg2+3lg5-2
=3-2
=1