Other irrelevant useful stuff, Maths Flashcards by Ava Gifford-Moore | Brainscape

Q

Cubic discriminant

A

18abcd-4b^3d+b^2d^2-4ac^3-27a^2d^2

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Q

Ellipse equation

A

(x-h)^2/a^2 + (y-k)^2/b^2 = 1

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Q

Focus of an ellipse

A

sqrt. (a^2-b^2)

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