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问题: lg^2(5)+lg2*lg50+4^㏒2(3)=?

lg^2(5)+lg2*lg50+4^㏒2(3)=?

解答:

(lg5)^2+lg2*(lg2+lg25)+2^(2log2(3)
=(lg5)^2+lg2*lg2+lg2*2lg5+2^log2(9)
=(lg5)^2+(lg2)^2+2lg2lg5+9
=(lg5+lg2)^2+9
=(lg10)^2+9
=10