Question

2(lg

2

)2+lg

2

•lg5+

(lg 2 )2-lg2+1

=______．

Answer 1

2(lg

2

)2+lg

2

•lg5+

(lg 2 )2-lg2+1

=lg

2

（2lg

2

+lg5）+1-lg

2

=lg

2

×lg10+1-lg

2

=1，
故答案为1．