Respuesta :

parry1
this is true only if one of a or b is negative
(a-b)^2 is 0
a^2+b^2-2ab=0
a^2+b^2=2ab

(A-b)^2 is 0
if a-b=0
jhonyy9
this may be equal with this formula of 

(a-b)^2 = a^2 -2ab +b^2

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