1) √x-y²; x = 15; y = -7
√15 (-7)² = 15+49 = 64
√64 = 8
2)d=√п/4S
3) √18 = √3 * √6
√26 = √13 * √2
√30 = √5 * √6 <-----<br>
4)√0.64 * 36 = 0.8 * 6 = 4.8
5)√320 / √8 = √40
6) (3√8)²/24 = 9*8/24 = 9/3 = 3
7) 2√12 - √75 = √4*12 -75 = √-27 ?! --- Решений нет.
8)2a² = 2(√3-1)² = 2*(3-1) = 4
9) 10 < 2√30
√100 < √4*30
√100 < √120
10)√a² = √V/h
h = √a²/V = a/√V
11)1.75 ?
12)√2/5 + 5/2 + 10 = √ 4/10 + 25/10 + 10/10 = 39/10 = √3 9/10 ?