[3(x-2)-2(x-1)]× [x(x+3)-x(x+2)+5] va rog frumos

Răspuns :

=(3x-6-2x+2)×(x^2+3x-x^2-2x+5)=
=(x-4)×(x+5)=x^2+5x-4x-20=
=x^2+x-20