】求值:lg25+1g2×lg50+(lg2)²RT

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】求值:lg25+1g2×lg50+(lg2)²RT

】求值:lg25+1g2×lg50+(lg2)²RT
】求值:lg25+1g2×lg50+(lg2)²
RT

】求值:lg25+1g2×lg50+(lg2)²RT
lg25+lg2*lg50+(lg2)^2=2lg5+lg2*(1+lg5)+(lg2)^2=2lg5+lg2+lg2*lg5+(lg2)^2
=2lg5+lg2+lg2(lg5+lg2)=2lg5+lg2+lg2*lg10
=2lg5+2kg2=2(lg5+lg2)=2lg10=2

lg25+1g2×lg50+(lg2)²
=lg25+1g2×(lg50+lg2)
=lg25+1g2×lg100
=2lg5+21g2
=2(lg5+1g2)
=2