قانون الضرب المختصر الثالث
(a b)2 a2 2ab b2
(a b)2 (a b)(a b) a2 ab ab b2 a2 2ab b2
b a a ab b ab
a b ab ab a (a b)2 b(a b) b(a b) b b2
(a b)2 a2 b(a b) b(a b) b2
(a b)2 a2 b(a b) b(a b) b2 a2 ba b2 ba b2 b2 a2 2ab b2
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