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Descompuneti in factori trinomul .
X²-2X-8
4X²-3X-1
-X²+X+2


Răspuns :

[tex]\it x^2-2x-8=x^2-2x+1-9=(x-1)^2-3^2= \it= (x-1-3)(x-1+3) = (x-4)(x+2)[/tex]