Question

Решите уравнение пожалуйста

Answer 1

$x {}^{2} - 32 = - 4x \\ x {}^{2} - 32 + 4x = 0 \\ x {}^{2} + 4x - 32 = 0 \\ d = b {}^{2} - 4ac = 4 {}^{2} + 4 \times 32 = 16 + 128 = 144 \\ \sqrt{144} = 12 \\ x1 = \frac{ - 4 - 12}{2} = \frac{ - 16}{2} = - 8 \\ x2 = \frac{ - 4 + 12}{2} = \frac{8}{2} = 4$