作业帮Lg25+2\3Lg98+Lg5×Lg20＋Lg2×Lg2=?
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/12 02:16:34
Lg25+2\3Lg98+Lg5×Lg20＋Lg2×Lg2=?
Lg25+2\3Lg98+Lg5×Lg20＋Lg2×Lg2=?
Lg25+2\3Lg98+Lg5×Lg20＋Lg2×Lg2=?
Lg25+2\3Lg98+Lg5×Lg20＋Lg2×Lg2
=2-2lg2+2/3lg2+4/3lg7+(lg5)^2+2lg2lg5+(lg2)^2
=4/3lg2+4/3lg7+1
=1+4/3lg14