2lg5 lg2*lg50 (lg2)2

(2/3)lg8+(lg(5))^2+lg2*lg50+lg25=2lg2+(lg(10/2))^2+lg2*(lg(100/2))+lg(100/4)=2lg2+(1-lg2)^2+lg2(2-lg

再问：log2*log2貌似不等于log平方2吧再答：

原式=lg5+lg10+lg2(lg5+lg2)=lg5+1+lg2lg10=lg5+1+lg2=lg10+1=1+1=2

你这问题是不是有点错误!要是真的对的话,那就是应该2.25是2乘以25,不就是50嘛

lg²2+lg50+lg2*lg5=lg²2+lg2*lg5+lg50=lg2*(lg2+lg5)+lg50=lg2*lg(2*5)+lg50=lg2*lg10+lg50=lg2+

因为（lg5)^2+lg2*lg50=（lg5)^2+lg2*lg(5*10)=（lg5)^2+lg2*(lg5+lg10)=(lg5)^2+lg2(lg5+1)=lg5*(lg2+lg5)+lg2=

错了是=(lg5)²+(lg50)×lg2=(lg5)²+(lg5+1)×lg2=(lg5)²+lg5×lg2+lg2=lg5×(lg5+lg2)+lg2=lg5×1+l

原式=lg5*lg5+lg2(lg5+1)=lg5*lg5+lg5*lg2+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=1

(lg5)的平方+lg2*lg50=(lg5)的平方+lg2*(lg5+lg10)=(lg5)的平方+lg2*lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg10=1祝你好运

(lg50)^2+lg2*lg50^2+(lg2)^2=(lg50)^2+2lg2*lg50+(lg2)^2=(lg50+lg2)^2=(lg100)^2=2^2=4

lg(5)^2+lg2*lg50=lg5*lg5+lg2(lg2+2lg5)=lg5*lg5+lg2*lg2+lg2*lg5+lg2*lg5=lg5(lg5+lg2)+lg2(lg2+lg5)=lg5

=(lg5)²+lg2(lg5+lg10)=(lg5)²+lg2lg5+lg2×1=lg5(lg5+lg2)+lg2=lg5+lg2=1

(lg2)²+2lg5+lg2·lg50=lg2·(lg2+lg50)+2lg5=lg2·lg(2·50)+2lg5=lg2·lg100+2lg5=2lg2+2lg5=2·(lg2+lg5)

lg50)^2+lg2*lg(50)^2+(lg2)^2=（lg50)^2+lg2*lg[(50)^2]+(lg2)^2=（lg50)^2+2lg2*lg(50)+(lg2)^2=(lg50+lg2)

(lg2)²+lg2lg50+lg25=(lg2)²+lg2×lg(5²×2)+lg5²=(lg2)²+lg2(2lg5+lg2)+2lg5=(lg2

lg²5+lg2·lg50=lg²5+lg2·(lg2+lg25)=lg²5+lg²2+2lg5lg2=(lg5+lg2)²=1

原式=lg^2(5)-lg(2)+lg(2)*[lg(2)+2lg(5)]+[lg(5)-lg(2)-lg(5)]=lg^2(5)+2lg(2)lg(5)+lg^2(2)=[lg(2)+lg(5)]^

(lg5)^2+(lg2)*(lg50)=(lg5)^2+(lg2)*(lg2*25)=(lg5)^2+(lg2)*(lg2+lg5^2)=(lg5)^2+2lg2lg5+(lg2)^2=(lg5+l

(lg5)^2+lg2*lg50=(lg5)^2+lg2*(lg10+lg5)=(lg5)^2+lg2*lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg(2*5)=1

lg²5+lg2×lg50=lg²5+lg2×lg(5²×2)=lg²5+lg2×(2lg5+lg2)=lg²5+2lg5lg2+lg²2=