The middle school affiliated to Harbin Normal University 20 13-20 14, senior one, took the math testNo. 17, and the square of lg root number 2 +LG root number 10-2 (LG root number 2) -lg root number 2
The middle school affiliated to Harbin Normal University 20 13-20 14, senior one, took the math testNo. 17, and the square of lg root number 2 +LG root number 10-2 (LG root number 2) -lg root number 2*lg5.
lg√2+lg 10-2(lg√2)？ -lg√2*lg5
= 1/2lg 2+ 1-2( 1/2lg 2)？ - 1/2lg2*(lg 10-lg2)
= 1/2lg 2+ 1- 1/2(lg2)？ - 1/2lg2+ 1/2(lg2)？
= 1