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x patrat -5x -14?Descompunere
x patrat -7x-18?Descompunere


Răspuns :

x^2-5x-14=x^2+2x-7x-14 =x(x+2)-7(x+2) =
(x+2)(x-7)

x^2-7x-18= x^2+2x-9x-18=x(x+2)-9(x+2)=(x+2)(x-9)