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Descompuneti in factori n^2-n-12

Răspuns :

[tex] n^{2} -n-12= n^{2} -9-n-3=(n+3)(n-3)-(n+3)= \\ =(n+3)(n-3-1)=\boxed{(n+3)(n-4)}.[/tex]
n²-n-12=n²+3n-4n-12=n(n+3)-4(n+3)=(n+3)(n-4)