lg25+lg2lg50+(lg2)^2=THANKS.

分类: 作业答案 • 2022-02-26 17:28:03

问题描述：

lg25+lg2lg50+(lg2)^2=
THANKS.

答

lg25 + lg2*lg50 + (lg2)^2
= lg25 + lg2*(1 + lg5) + (lg2)^2
= lg25 + lg2 + lg2*lg5 + lg2*lg2
= (lg25 + lg2) + lg2(lg5 + lg2)
= lg50 + lg2
= lg100
= 2