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cum descompun in factori x la a 3 a+x-2?

Răspuns :

x la a 3 a+x-2=
x la a 3 a  -  x la a 2 a  + x la a 2 a  - x  + 2x -2=
x la a 2 a(x-1) + x (x-1) +2(x-1)=
(x-1)(x2 +x +2)



x^3+x-2=x^3-1+x-1=(x-1)(x^2+x+1)+x-1=(x-1)(x^2+x+2)