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AntonioSzt
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Descompunere in factori primi

Descompunere In Factori Primi class=

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[tex](3x+2)^2-1=(3x+2-1)(3x+2+1)= (3x+1)(3x+3)= \\ =3(x+1)(3x+1)\\ \text{Am folosit identitatea:}\\ \boxed{a^2-b^2=(a-b)(a+b)}[/tex]