Question

Arătaţi ca 2+x-2x-x°3=(x+2)(1-x)(1+x)
"°"- am pus-o sa arate ca x e la puterea a 3-a

Answer 1

2-2x+x-x³=2(1-x)+x(1-x²)=2(1-x)+x(1-x)(1+x)=(1-x)(1+x)(2+x)