Răspunsuri

2014-06-16T17:13:29+03:00
(x-1)^3=x^3-3x^2+3x-1
2(x-1)^2=2(x^2+1-2x)=2x^2+2-4x
le adunam pe cele 2 si x-1 si obtinem
x^3-3x^2+3x -1+2x^2+2- 4x+x-1=x^3-x^2+3x-4x+x-1+2-1=x^2(x-1)
1 5 1