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Descompuneti in factori : (3x+1) totul la puterea 2 - 4x la puterea 2

Răspuns :

(3x+1)^2-4x^2= (3x+1-2x)(3x+1+2x)

sau...

(3x+1)^2-4x^2=
9x^2+6x+14x^2=
5x^2+6x+1=
(5x+1)(x+1)