E(x, y) = (150000 - 100·x)·x + (300000 - 350·y)·y
E(x, y) = - 100·x^2 + 150000·x - 350·y^2 + 300000·y
G(x, y) = - 100·x^2 + 150000·x - 350·y^2 + 300000·y - (200·x·y + 20000·x + 40500·y + 13300)
G(x, y) = - 100·x^2 - 200·x·y + 130000·x - 350·y^2 + 259500·y - 13300