lg5^2+lg4+lg5*lg20+(lg2)^2
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lg5^2+lg4+lg5*lg20+(lg2)^2lg5^2+lg4+lg5*lg20+(lg2)^2lg5^2+lg4+lg5*lg20+(lg2)^2lg5^2+lg4+lg5*lg20+(lg
lg5^2+lg4+lg5*lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^2
=lg(25*4)+(lg10-lg2)(lg10+lg2)+(lg2)^2
=lg100+(1-lg2)(1+lg2)+(lg2)^2
=2+1-(lg2)^2+(lg2)^2
=3
lg4+lg5.lg20+(lg5)2
lg4+lg5.lg20+(lg5)2
lg5^2+lg4+lg5*lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^@
lg2*lg50-lg5*lg20-lg4
lg25+lg4+lg平方2+lg5*lg20等于多少?
2lg5+lg20=?lg5*lg20=?
lg2·lg50-lg5·lg20-lg4
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
lg4+lg5lg20+(lg5)^2
lg5/2+lg4=?
对数lg2*lg5=?2lg（5）+2/3 lg8+lg5*lg20+lg2 =lg5^2+lg8^(2/3)+lg5*(lg4+lg5)+lg2 =lg100+lg5+2lg2*lg5+lg2 =2+(lg5+lg2) =2+1 =3 第二个等号lg5*(lg4+lg5)为什么=lg5+2lg2*lg5
lg20+lg5
(lg2)^2+lg20*lg5+(lg5)^2
lg2*lg50+lg5*lg20-2lg5*lg2
计算(lg5)^2+lg4*lg5+(lg2)^2
(lg5)^2+lg4*lg5+(lg2)^2