m=(3x-1)la patrat-(6x-2) inmultit (x-5)+(x-5)la patrat

Răspuns :

[(3x-1)²-2(3x-1)]*(x-5)(1+x-5)=(3x-1)(3x-1+2)(x-5)(x-4)=(3x-1)(3x+1)(x-5)(x-4)=
(9x²-1)(x-5)(x-4)