lg²2+lg2×lg5+lg²5=?

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/08 19:26:46

lg²2+lg2×lg5+lg²5=?

lg2=lg10/5=lg10-lg5=1-lg5
lg²2+lg2×lg5+lg²5
=(1-lg5)²+(1-lg5)×lg5+lg²5
=1-2lg5+lg²5+lg5-lg²5+lg²5
=1-lg5+lg²5
lg²2+2lg2×lg5+lg²5=(lg2+lg5)²=lg²10=1

lg²2+lg2×lg5+lg²5=? (lg²2-lg2*lg5+lg²)+3lg2*lg5 lg50+lg2*lg5+lg²2=? lg²2+lg2×lg5+lg²5 lg²5+lg2×lg5+lg2 lg²5+lg2+lg2*lg5? lg²5+lg2*lg5+lg2 lg^2 5+lg2*lg5+lg2=? lg²2+lg2·lg5+lg5=____________ lg2×lg5=?lg2×lg5=lg?求问号..是lg（2+5）吗? lg²2+ lg2*lg5+ lg5的值 lg5×lg(5×2)+lg2怎莫算具体