а) 5√3 × 2√3 = 10√3 × 3 = 30√3б) 3√5 × 4√20 = 12√100 = 12 10 = 120в) (2√5)² / 10 = (4 5) / 10 = 20 / 10 = 2г) √8 / √50 = √(8/50) = √0.16 = 0.4д) 2√10 × √2 / √80 = 2√(10 2) / √(8 10) = 2√20 / √80 = 2√20 / 4 = √20 / 2 = √(4 * 5) / 2 = 2√5 / 2 = √5
а) 5√3 × 2√3 = 10√3 × 3 = 30√3
б) 3√5 × 4√20 = 12√100 = 12 10 = 120
в) (2√5)² / 10 = (4 5) / 10 = 20 / 10 = 2
г) √8 / √50 = √(8/50) = √0.16 = 0.4
д) 2√10 × √2 / √80 = 2√(10 2) / √(8 10) = 2√20 / √80 = 2√20 / 4 = √20 / 2 = √(4 * 5) / 2 = 2√5 / 2 = √5