(lg5)^2+lg2*lg50

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(lg5)^2+lg2*lg50(lg5)^2+lg2*lg50(lg5)^2+lg2*lg50(lg5)^2+lg2*lg50=(lg5)^2+lg2*(1+lg5)=(lg5)^2+lg2*lg5

(lg5)^2+lg2*lg50
(lg5)^2+lg2*lg50

(lg5)^2+lg2*lg50
(lg5)^2+lg2*lg50
=(lg5)^2+lg2*(1+lg5)
= (lg5)^2+lg2*lg5+lg2
=lg5(lg5+lg2)+lg2
=lg5+lg2
=1

两个