구 해 2 (log 5) 10 + (log 5) 0.25 귀찮아.

구 해 2 (log 5) 10 + (log 5) 0.25 귀찮아.

2 (log 5) 10 + (log 5) 0.25 = log 5 (100) + log 5 (0.25) = log 5 (25) = 2