lg25+2/3lg8+lg5*lg20+(lg2)^2

来源：学生作业帮助网编辑：作业帮时间：2024/05/15 12:51:38

lg25+2/3lg8+lg5*lg20+(lg2)^2
lg25+2/3lg8+lg5*lg20+(lg2)^2

lg25+2/3lg8+lg5*lg20+(lg2)^2
lg25+2/3lg8+lg5*lg20+lg^22
=2lg5+2lg2+lg5*(2lg2+lg5)+lg2*lg2
=2(lg5+lg2)+(lg5)^2+2lg2*lg5+(lg2)^2
=2lg10+(lg5+lg2)^2
=2+1^2
=3