3) Решить уравнения: 1) √x = 0.5 2) 3√x = 15 3) √(x + 7) = 0 4) 2 - 3√x = 0

Решение: 1) √x = 0.5 => x = 0.5^2 = 0.25; 2) 3√x = 15 => √x = 15/3 = 5 => x = 5^2 = 25; 3) √(x + 7) = 0 => x + 7 = 0 => x = -7; 4) 2 - 3√x = 0 => 3√x = 2 => √x = 2/3 => x = (2/3)^2 = 4/9.