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[tex] (5x-1)^{2} - (2x+2)^{2} [/tex] Descompuneti in factori

Răspuns :

(5x-1)²-(2x+2)²=(5x-1-2x-2)(5x-1+2x+2)=(3x-3)(7x+1)=3(x-1)(7x+1)