作业帮(lg5)^2+lg2*lg50 求值
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(lg5)^2+lg2*lg50 求值
(lg5)^2+lg2*lg50 求值
(lg5)^2+lg2*lg50 求值
=(lg5)^2+lg2*(lg5+1)
=(lg5)^2+(1-lg5)(1+lg5)
=(lg5)^2+1-(lg5)^2
=1
(lg5)²+lg2×lg50
=(lg5)²+lg2×(lg5+lg10)
=(lg5)²+lg2×lg5+lg2
=(lg5)×(lg5+lg2)+lg2
=lg5×1+lg2
=lg(5×2)
=1
(lg5)^2+lg2*lg50 求值
（lg5)^2+lg2*lg50
lg2*lg50+lg5*lg20-2lg5*lg2
1：求值（lg5)平方+lg2×lg50
求值lg2*lg50+lg5*lg20-lg100*lg2*lg5
化简 (lg5)^2+(lg2)lg50
(lg5)^2+lg2×lg50=?
(lg5)^2 + (lg2)*(lg50)=
(lg5)^2+lg2*lg50=
lg50+lg2*lg5+(lg2)^2=
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2
计算（lg5)^2+lg2·lg50
1.（lg5）2次方+lg2*lg50
计算:(lg5)2+lg2*lg50=?
lg50+lg2*lg5+lg²2=?
(lg5)^2+lg2·lg50=?求救...
（lg5)²+lg2×lg50
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?