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Trinomial Identity
Definition
(x^2 + a x y + b y^2)(t^2 + a t u + b u^2) = r^2 + a r s + b s^2, where r | = | x t - b y u s | = | y t + x u + a y u.
Related term
(x^2 + a x y + b y^2)(t^2 + a t u + b u^2) = r^2 + a r s + b s^2, where r | = | x t - b y u s | = | y t + x u + a y u.