Question

36. Решите уравнение​

Answer 1

1) x² – 5x – 12 = 6

x² – 5x – 18 = 0

D = 5² + 4·18 = 97

x₁ = (5 – √97) / 2

x₂ = (5 + √97) / 2

3) x² + 8x = –16 – 2x

x² + 10x + 16 = 0

D = 10² – 4·16 = 36 = 6²

x₁ = (–10 – 6) / 2 = –8

x₂ = (–10 + 6) / 2 = –2