Calculation: (1) LG25 + lg2lg50 + (LG2) 2 (2) 813 + (12) − 2 + (27-1 + 16-2) 0 + 416

Calculation: (1) LG25 + lg2lg50 + (LG2) 2 (2) 813 + (12) − 2 + (27-1 + 16-2) 0 + 416


(1) The original formula = 2lg5 + LG2 (1 + lg5) + lg22 = 2lg5 + LG2 + LG2 (lg5 + LG2) = 2 (lg5 + LG2) = 2. (2) the original formula = (23) 13 + (2-1) - 2 + 1 + 2 = 2 + 2 + 3 = 7



How much is LG25 + LG2 * LG50~
RT, there must be a process~


lg25=2lg5
lg50=lg2+lg25=lg2+2lg5
The original formula = 2lg5 + LG2 * (lg5 + 1) = LG2 * lg5 + LG2 + 2lg5 = 1 + lg5 + LG2 * lg5



Calculate LG25 + LG50 + LG2 * lg500 + (LG2) ^ 2


=2lg5+1+lg5+(1-lg5)*(2+lg5)+(1-lg5)^2
=3lg5+1+2+lg5-2lg5-(lg5)^2+1-2lg5+(lg5)^2
=4