Решите уравнение: -4x-5x^2+12=0.

\[- 4x - 5x^{2} + 12 = 0\]

\[5x^{2} + 4x - 12 = 0\]

\[D_{1} = 4 + 60 = 64\]

\[x_{1} = \frac{- 2 + 8}{5} = \frac{6}{5} = 1,2;\]

\[x_{2} = \frac{- 2 - 8}{5} = - 2.\]

\[Ответ:x = - 2;x = 1,2.\]