Question

Помогите решить уравнение

Answer 1

$2x + 4 = {7}^{ - \frac{1}{2} } \\ 2x + 4 = \frac{1}{ \sqrt{7} } \\ 2x = \frac{1}{ \sqrt{7} } - 4 \\ x = \frac{1}{2 \sqrt{7} } - 2 \\ x = \frac{ \sqrt{7} }{14} - 2 \\ x = \frac{ \sqrt{7} - 28}{14}$