Question

(log 0,3 9-2 log 0,3 10)^4

Answer 1

$(log_{0,3}9-2log_{0,3}10)^4\(log_{0,3}9-log_{0,3}100)^4\(log_{0,3}()frac{9}{100} )^4 \ (log_{0,3}0,09)^4=2^4 = 16$