Question

Разложить на множители: (a2+2)(a-1)-a(a2+2)

Answer 1

(a^2 + 2)(a- 1) - a(a^2 + 2)= (a^2 + 2)(a- 1 - a) = - 1 ( a^2 + 2) =
= - (a^2 + 2)