Question

(a+1)(a-1)(a^2+1)=?​

Answer 1

Answer:

a(a-1)+1(a-1)(a²+1)

a²-a+a-1(a²+1)

a²-1)(a²+1)

a²(a2+1)-1(a²+1)

a*4+a²-a²-1

a*4-1

Answer 2

Answer:

a^4-1

Step-by-step explanation:

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

= a^4-1

from the formula (a+b)*(a-b) = a^2-b^2