lg25+lg2*lg50+(lg2)^2怎么计算,

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lg25+lg2*lg50+(lg2)^2怎么计算,

lg25+lg2*lg50+(lg2)^2怎么计算,
lg25+lg2*lg50+(lg2)^2怎么计算,

lg25+lg2*lg50+(lg2)^2怎么计算,
=lg5²+lg2*(lg5+lg10)+(lg2)²
=2lg5+lg2*lg5+lg2+(lg2)²
=2lg5+lg2(lg5+lg2)+lg2
=2lg5+lg2+lg2
=2(lg5+lg2)
=2

=lg25+lg2*(lg50+lg2)
=lg25+lg2*lg100
=lg25+lg2*(2lg10)
=lg25+lg2*(2*1)
=lg25+2lg2
=lg25+lg(2^2)
=lg(25*4)
=lg100
=2