- 12" alt=" \sqrt{x } - x = - 12 \\ \sqrt{x} = - 12 + x \\ x = x {}^{2} - 24x + 144 \\ x - x {}^{2} + 24x - 144 = 0 \\ 25x - x {}^{2} - 144 = 0 \\ \: x {}^{2} - 25x + 144 = 0 \\ d = 625 - 576 = 49 \\ x = \frac{25 + \sqrt{49} }{2} \\ x = 16 \\ x = \frac{25 - \sqrt{49} }{2} \\ x = 9 \\ \\ \\ \sqrt{16} - 16 = - 12 \\ 4 - 16 = - 12 \\ - 12 = - 12 \\ \sqrt{9} - 9 = - 12 \\ 3 - 9 = - 12 \\ - 6 > - 12" align="absmiddle" class="latex-formula">
Ответ -6>-12 не подходит
значит
Ответ : х=16