(lg2)*(lg2)+lg5*lg20-1怎么计算
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(lg2)*(lg2)+lg5*lg20-1怎么计算
(lg2)²+lg5×lg20-1
=(lg2)²+lg5×(lg10+lg2)-1
=(lg2)²+lg5×(lg2+1)-1
=(lg2)²+lg5lg2+lg5-1
=lg2(lg2+lg5)+lg5-1
=lg2 +lg5-1
=0
lg2*lg2+lg20*lg5=?
lg5*lg20+(lg2)^
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
lg2*lg50+lg5*lg20-2lg5*lg2
(lg2)*(lg2)+lg5*lg20-1怎么计算
lg5·lg20+(lg2)^2
lg2*lg50-lg5*lg20-lg4
为什么lg5*lg20=lg5*(1+lg2)
lg5^2+lg4+lg5*lg20+(lg2)^@
lg5^2+lg4+lg5*lg20+(lg2)^2
lg2lg50+lg5×lg20-lg100×lg5×lg2=
(lg2)^2+lg20*lg5+(lg5)^2
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2
求值lg2*lg50+lg5*lg20-lg100*lg2*lg5
(lg2)^2+lg5·lg20-1=?
(lg2)的平方+lg20×lg5答案,
(lg2)^2 lg5×lg20-1