(lg2)^2+lg5*lg20
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(lg2)^2+lg5*lg20(lg2)^2+lg5*lg20(lg2)^2+lg5*lg20(lg2)^2+lg5*lg20=(lg2)^2+lg(10/2)*lg(10*2)=(lg2)^2+(
(lg2)^2+lg5*lg20
(lg2)^2+lg5*lg20
(lg2)^2+lg5*lg20
(lg2)^2+lg5*lg20
=(lg2)^2+lg(10/2)*lg(10*2)
=(lg2)^2+(1-lg2)*(1+lg2)
=(lg2)^2+1-(lg2)^2
=1
(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