作业帮(lg5)^2+lg2·lg50=?求救...
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(lg5)^2+lg2·lg50=?求救...
(lg5)^2+lg2·lg50=?
求救...
(lg5)^2+lg2·lg50=?求救...
lg²5+lg2•lg50
=lg²5+lg2•lg(5•10)
=lg²5+lg2•(lg5+lg10)
=lg²5+lg2•lg5+lg2
=lg5•(lg5+lg2)+lg2
=lg5•[lg(5•2)]+lg2
=lg5•lg10+lg2
=lg5+lg2
=lg(5•2)
=1
(lg5)^2+lg2·lg50 =(lg5)^2+lg2*lg(2*25)
=(lg5)^2+lg2*(lg2+lg25) =(lg5)^2+lg2*(lg2+2lg5)
=(lg5)^2+(lg2)^2+2lg5lg2 =(lg5+lg2)^2
(lg5)^2+lg2·lg50=?求救...
(lg5)^2+lg2×lg50=?
(lg5)^2 + (lg2)*(lg50)=
(lg5)^2+lg2*lg50=
lg50+lg2*lg5+(lg2)^2=
（lg5)^2+lg2*lg50
计算（lg5)^2+lg2·lg50
计算:(lg5)2+lg2*lg50=?
lg50+lg2*lg5+lg²2=?
lg2*lg50+lg5*lg20-2lg5*lg2
(lg5)²+lg2*lg50=?
化简 (lg5)^2+(lg2)lg50
(lg5)^2+lg2*lg50 求值
计算(lg2)²+2lg2·lg5+(lg5)²+lg50－lg5求答案,
lg^2 2+2lg5+lg2·lg50
2【lg5】^2+2lg2•lg50=?
lg2·lg50+lg5·lg20-lg100·lg5·lg2=?
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2