Question

(a + 1) (a - 1) (1 - a + a²) (1 + a + a²) (1 + a^6 ) =
(A) 1 + a^12
(B) 1 -a^9
(C) 1 - a^12
(D) a^12 - 1​

Answer 1

Answer:

half answer is in another photo

hope it help you