Réponse :
(3x+4)(3x-4) = (3x)^2 - (4)^2 = 9x^2 - 16
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a^2-b^2= (3x)^2-4^2= 9x^2-16Réponse :
(3x+4)(3x-4) = (3x)^2 - (4)^2 = 9x^2 - 16