(lg2)3+（lg5)3+lg5·lg8括号外的数字为次方

(lg²2-lg2*lg5+lg²)+3lg2*lg5 lg2(lg5-lg2)-lg5(lg5+3lg2)等于 (lg2)^3+3lg2·lg5+(lg5)^3 怎么算? (lg2)^3+3lg2·lg5+(lg5)^3 怎么算? (lg2)^3+(lg5)^3+3*lg2*lg5 (lg2)³+(lg5)³+3lg2×lg5 对数lg2*lg5=?2lg（5）+2/3 lg8+lg5*lg20+lg2 =lg5^2+lg8^(2/3)+lg5*(lg4+lg5)+lg2 =lg100+lg5+2lg2*lg5+lg2 =2+(lg5+lg2) =2+1 =3 第二个等号lg5*(lg4+lg5)为什么=lg5+2lg2*lg5 lg25+2/3lg8+lg5·lg20+lg^22我见到个过程是lg25+2/3lg8+lg5乘以lg20+lg^22=2lg5+2lg2+lg5*(2lg2+lg5)+lg2*lg2=2(lg5+lg2)+(lg5)^2+2lg2*lg5+(lg2)^2=2lg10+(lg5+lg2)^2=2+1^2=3 我想问一下,第3步怎么到第4步的?错了,是第2步怎么到第3 3+lg5+(lg2)^2 3lg2-lg5= lg²2+lg2·lg5+lg5=____________ (lg8+lg1000)lg5+3(lg2)^2+lg^-1+lg0.006 lg²2+lg2×lg5+lg5 (lg^2)2+lg2*lg5+lg5 （lg2）^3+(lg5)^3+3lg2*lg5等于? (lg2)^3+(lg5)^3+3lg2*lg5怎么算RT (lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算. (lg2)^3+(lg5)^3+3lg2*lg5的值为?