Question

Factor this expression completely.
a^3 - 1
How do you figure this out??

Answer 1

a^3-1 = a^3 - 1^3
a^3-b^3 = (a-b)(a^2+ab+b^2).
a=a, b = 1

Answer 2

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

Answer 3

Thank you very much!!