import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(-10, 10, 400)
y = np.linspace(-10, 10, 400)
X, Y = np.meshgrid(x, y)
Z = 2X + 3X2 + Y2 - 2XY

plt.figure(figsize=(8, 6))
plt.contour(X, Y, Z, levels=[0], colors='r')
plt.title('График уравнения 2x + 3x^2 + y^2 - 2xy = 0')
plt.xlabel('x')
plt.ylabel('y')
plt.grid(True)
plt.show()