2. Найдите значение выражения: 1) 0,5√1600-1/3√36; 2) √0,25⋅81; 3) √6²⋅2³; 4) √20⋅√5-√63/√7

1) 0,5√1600 - 1/3√36 = 0,5 * 40 - 1/3 * 6 = 20 - 2 = 18

2) √0,25 ⋅ 81 = √0,25 * √81 = 0,5 * 9 = 4,5

3) √6² ⋅ 2³ = √(36 ⋅ 8) = √288 = √(144 ⋅ 2) = 12√2

4) √20 ⋅ √5 - √63 / √7 = √(20 ⋅ 5) - √(63 / 7) = √100 - √9 = 10 - 3 = 7

Ответ: 1) 18; 2) 4,5; 3) 12√2; 4) 7