eq1: (16 * x^(2)) + (25 * y^(2)) = 400
O = Center(eq1)
F_1, F_2 = Focus(eq1)
a = FirstAxisLength(eq1)
b = SecondAxisLength(eq1)
ε = Eccentricity(eq1)
jj, jj_1 = Directrix(eq1)