Question

I have to use factorisation in every one of these but im so stuck i dont remember anything. i hope someone could at least solve one of these. i have only the exercises that are noted​

16 POINTS

Answer 1

12.

V. E=(1-a)(1+a)(1+a^2)(1+a^4)(1+a^8)

Explanation:

1-a^16=(1-a^8)(1+a^8)

1-a^8=(1-a^4)(1+a^4)

1-a^4=(1-a^2)(1+a^2)

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

1-a^16=(1-a)(1+a)(1+a^2)(1+a^4)(1+a^8)