SOLUTION: Factor completely: a^4-1 I got the answer (a^2+1)(a+1)(a-1) but I don't know how Please show me step by step to get the answer. thanks

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Factor completely: a^4-1 I got the answer (a^2+1)(a+1)(a-1) but I don't know how Please show me step by step to get the answer. thanks      Log On


   

Question 451705: Factor completely: a^4-1
I got the answer (a^2+1)(a+1)(a-1) but I don't know how
Please show me step by step to get the answer. thanks
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
a4-1=(a2+1)(a2-1)
""=(a2+1)(a+1)(a-1)..