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  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> 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