(lg2)^2+lg20*lg5
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/10 19:18:00
(lg2)^2+lg20*lg5(lg2)^2+lg20*lg5(lg2)^2+lg20*lg5（lg2）^2+lg20*la5=(lg2)^2+lg(2*10)*lg(10/2)=(lg2)^2+(
(lg2)^2+lg20*lg5
(lg2)^2+lg20*lg5
(lg2)^2+lg20*lg5
（lg2）^2+lg20*la5=(lg2)^2+lg(2*10)*lg(10/2)=(lg2)^2+(lg2+1)*(1-lg2)=(lg2)^2+1-(lg2)^2=1
用到的公式有：lgab=lga+lgb
lgab=lga-lgb
平方差公式:(a-b)(a+b)=a^2-b^2
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
lg2*lg50+lg5*lg20-2lg5*lg2
lg5·lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^2
(lg2)^2+lg20*lg5+(lg5)^2
lg5^2+lg4+lg5*lg20+(lg2)^@
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2
（lg2)^2+lg5·lg20-1=?
(lg2)^2 lg5×lg20－1
lg5*lg20+(lg2)^
lg2*lg2+lg20*lg5=?
lg5^2+2/3lg8+lg5*lg20+lg2^2
lg5^2+lg8^2/3+lg5*lg20+(lg2)^2=?
（lg5)平方+2/3lg8+lg5乘lg20+（lg2)平方
lg5²+2/3lg8+lg5*lg20+(lg2)²
lg5²+2/3lg8+lg5×lg20+(lg2)²
lg5^2+2/3lg8+lg5*lg20+(lg2)^2 lg5*lg20怎么办啊