Question

Номер 37.21 буквы: (б, г)

Answer 1

б) (а + 2)^3 - 4a(a + 2) = (a + 2)((a+2)^2 - 4a) = (a + 2)(a^2 + 2a + 4 - 4a) =

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

г)(a - 4)^3 + 8a(a - 4) = (a - 4)((a - 4)^2 + 8a) = (a - 4)(a^2 - 8a + 16 + 8a) =

= (a - 4)(a^2 + 16)