(lg2)²+(lg5)²+lg2xlg5=?(lg2)²+(lg5)²+lg2xlg5=?麻烦您把步骤也写上

问题描述:

(lg2)²+(lg5)²+lg2xlg5=?
(lg2)²+(lg5)²+lg2xlg5=?麻烦您把步骤也写上