Question

Cum rezolv:(a+1)(a+2)(a+3)?Multumesc

Answer 1

Desfaci parantezele:
(a+1)(a+2)(a+3)= ($a^{2}$+2a+a+2)(a+3)=
=($a^{2}$+3a+2)(a+3)=
=$a^{3}$+3$a^{2}$+3$a^{2}$+9a+2a+6=
=$a^{3}$+6$a^{2}$+11a+6