You may enter a conic section as a quadratic equation in x and y. Prior defined variables (e. g., numbers, points, vectors) can be
used within the conic’s equation.
Note: The conic section’s name can be entered
at the beginning of the input followed by a colon.
Examples:
· Ellipse ell: ell: 9 x^2 + 16 y^2 = 144
· Hyperbola hyp: hyp: 9 x^2 – 16 y^2 = 144
· Parabola par: par: y^2 = 4 x
· Circle c1: c1: x^2 + y^2 = 25
· Circle c2: c2: (x – 5)^2 + (y + 2)^2 = 25
Note: If you define two parameters a = 4 and b = 3 in advance, you may enter for example an ellipse as ell: b^2 x^2 + a^2 y^2 = a^2 b^2.