(lg5)²+lg5·lg20+1g4=?

(lg5)²+lg5·lg20+1g4=? lg20+lg5 lg5²+2/3lg8+lg5*lg20+(lg2)² lg5²+2/3lg8+lg5×lg20+(lg2)² lg5·lg20+(lg2)^2 化简（lg2）²+lg5*lg20 lg4+lg5.lg20+(lg5)2 lg4+lg5.lg20+(lg5)2 2lg5+lg20=?lg5*lg20=? lg2·lg50-lg5·lg20-lg4 （lg2)^2+lg5·lg20-1=? 数学lg5·lg20等于多少? lg5*lg20+(lg2)^ (lg2)^2+lg5*lg20 (lg2)^2+lg20*lg5 lg5*lg20怎么计算? lg5×lg20＝? 高一对数运算一道lg5²+2/3lg8+lg5*lg20+lg²2=