求值:(lg2)^2+lg2*lg5+log以3为底5的对数/log以3为底的对数

(lg5)^2+lg2*lg50 求值 求值:(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3 求值lg的平方2+lg2乘lg5+lg5 求值 ：lg5²+lg2*lg50+(lg2)²答案写；2lg5+lg2*lg(5*10)+(lg2)²①=2lg5+lg2*lg5+lg2+(lg2)² ②=2lg5+lg2*(lg5+lg2)+lg2③ .第 ②步怎么得到的怎么就变成了lg2*lg5+lg2? lg5+lg5*lg2+lg2*lg2 2lg2（lg2+lg5)+2lg5得数 (lg2)^2+lg2*lg5+(lg5)^2= lg2*lg50+lg5*lg20-2lg5*lg2 (lg5)平方+2*lg5*lg2+(lg2)平方 求值lg2*lg50+lg5*lg20-lg100*lg2*lg5 lg2(1+lg5)+(lg5)^2 计算：(lg5)^2 +lg2 *lg5 (lg5)^2+lg5.lg2= (lg2)^2+lg5*lg20 (lg2)^2+lg20*lg5 （lg5)^2+lg2*lg50 3+lg5+(lg2)^2 2lg5*lg2=