1. √2·3² = 3√2, √2·5⁴ = 5²√2 = 25√2, √2·7³ = 7√2·7 = 7√14,
√4·3⁵ = 2·3²√3 = 2·9√3 = 18√3,
√2⁵ 3⁷ = √2⁴· 2 ·3⁶· 3 = 2²·3³√2·3 = 4·27√6 = 108√6
2. √40 = √4·10 = 2√10,
√200 = √100·2 = 10√2, √4000 = √400·10 = 20√10,
√9800 = √4900·2 = 70√2, √0,02 = √0,01·2 = 0,1√2
3. √4a = 2√a, √12b = √4·3b = 2√3b, √45c = √9·5c = 3√5c, √32d = √16·2d = 4√2d