Question

помогите пожалуйста!!!​

Answer 1

Ответ:

$в) \sqrt{x + 2} = 5 \\ x + 2 = 25 \\ x = 25 - 2 \\ x = 23 \\ \sqrt{23 + 2} = 5 \\ 5 = 5 \\ x = 23 \\ г) \sqrt{7x - 1} = 1 \\ 7x - 1 = 1 \\ 7x = 1 + 1 \\ 7x = 2 \\ x = \frac{2}{7} \\ \sqrt{7 \times \frac{2}{7} - 1 } = 1 \\ 1 = 1 \\ x = \frac{2}{7}$