a2 + 2 · a · b + b2
(a + b)2 = a2 + 2ab + b2
(x – y)2 = x2 -2xy + y2
(2x+2y)2 = 4x2 +8xy + y2
(3a – 2b)2 = 9a2 -12ab +b2
(5w+z)2 = 25w2 + 10wz + z2
(6m-7n)2 = 36m2 – 84mn + 49n2
(4b + 9c)2 = 16b2 + 72bc + 81c2
(7x – 2y)2 = 49x2 -28xy +4y2
(8z + 3w)2 = 64z2 + 48zw +9w2
Binomio al cubo
(a + b)3
= a3 + 3a2b+3ab2+b3
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