а) √0,25 × 64 = √0,25 × √64 = 0,5 × 8 = 4
б) √56 × √14 = √(56 × 14) = √(4 × 14 × 14) = 2 × 14 = 28
в) √8/√2 = √(8/2) = √4 = 2
г) √3⁴ × 2⁶ = √(3⁴) × √(2⁶) = 3² × 2³ = 9 × 8 = 72