(lg2)^2+2lg2*lg5+(lg5)^2的值
问题描述:
(lg2)^2+2lg2*lg5+(lg5)^2的值
急
答
(lg2)^2+2lg2*lg5+(lg5)^2
=(lg2+lg5)^2
=lg(2*5)^2
=(lg10)^2
=1