4-2-1

Inputting Equations

4-2 Inputting Equations

This section explains the various ways you can input equations using the Conics Editor window.

Using a Conics Form to Input an Equation

Preset formats can help you input conics equations quickly and easily. The following table contains a complete list of the types of equations that you can input just by tapping [Form] and then [Insert Conics Form].

Conics Forms

Equations

Horizontal Parabola 1

x = A·(y – K)^2 + H

Horizontal Parabola 2

x = A·y^2 + B·y + C

Vertical Parabola 1

y= A·(x – H)^2 + K

Vertical Parabola 2

y = A·x^2 + B·x + C

Circle 1

(x – H)^2 + (y – K)^2 = R^2

Circle 2

A·x^2 + A·y^2 + B·x + C·y + D = 0

Ellipse

(x – H)^2 ⎟ A^2 + (y – K)^2 ⎟ B^2 = 1

Horizontal Hyperbola

(x – H)^2 ⎟ A^2 – (y – K)^2 ⎟ B^2 = 1

Vertical Hyperbola

(y – K)^2 ⎟ A^2 – (x – H)^2 ⎟ B^2 = 1

General Form

A·x^2 + B·x·y + C·y^2 + D·x + E·y + F = 0

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