Question

очень срочно!!!!!!!!!​

Answer 1

Ответ:

$8 - {x}^{2} + x(x + 8) = 4( x - 8) \\ 8 - {x}^{2} + {x}^{2} + 8x = 4x - 32 \\ 8 + 8x - 4x + 32 = 0 \\ 4x + 40 = 0 \\ 4x = 0 - 40 \\ 4x = - 40 \\ x = - 40 \div 4 \\ x = - 10$