lg²5+lg2*lg5+lg2=lg5²+1+lg2(里面的lg5²和1是怎么得的)要过程!

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lg²5+lg2*lg5+lg2=lg5²+1+lg2(里面的lg5²和1是怎么得的)要过程!lg²5+lg2*lg5+lg2=lg5²+1+lg2(

lg²5+lg2*lg5+lg2=lg5²+1+lg2(里面的lg5²和1是怎么得的)要过程!
lg²5+lg2*lg5+lg2
=lg5²+1+lg2(里面的lg5²和1是怎么得的)要过程!

lg²5+lg2*lg5+lg2=lg5²+1+lg2(里面的lg5²和1是怎么得的)要过程!
lg2*lg5
=lg(2*5)
=lg10
=1
lg^25=lg5^2