√27／4 =√(3*9/4) =√3*√(3²/2²) =(3/2)√3 √8／3 =√(24/9) =√(6*4/9) =√6*√(2²/3²) =(2/3)√6 √49／18 =√(2*7²/6²) =√2*√(7²/6²) =(7/6)√2 √28／45 √12倍x...