A(a-3)во2 –(a+3)(a во 2-3a+9)

Question

A(a-3)во2 –(a+3)(a во 2-3a+9)

Answer 1

А(a-3)^2 –(a+3)(a^2-3a+9)=а×(а^2-6а+9)-(а^3+27)=(а^3-6а^2+9а)-(а^3+27)=а^3-6а^2+9а-а^3-27=-6а^2+9а-27.