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descompuneti in factori (3x+5)la puterea 2 -(x+1)l a puterea 2


Răspuns :

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